**Otus asio mccallii(Cassin).—Specimens examined:total 2: ♂ 32041 from 2 mi. W Jiménez, 850 ft., June 20, 1952; and sex ? 31645 from La Gacha, 1600 ft., December 9, 1953.
Three subspecies of the Screech Owl,Otus asio, occur in northeastern México; two of these,suttoniandmccallii, occur in Coahuila, the latter in the eastern part. The third subspecies,O. a. semplei, occurs still farther east, for example in the state of Nuevo León on the Mesa del Chipinque 6 miles south of Monterrey (Sutton and Burleigh, 1939b:174).
Nos. 31645 and 32041 differ fromsempleiin that the tops of their heads do not appear to be solid blackish brown at a distance of four to five feet and in that the dark streakings of their backs and scapulars are not so heavy as insemplei. The mentioned specimens are brownish, not more black and white throughout as insuttoninor are their toes heavily feathered (see Moore, 1941:154).
Findley observed a Screech Owl 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952. La Gacha would seem to represent the western extent ofmccalliiin Coahuila.O. a. mccalliiandsuttoniprobably intergrade along the eastern slope of the Sierra del Carmen. Tordoff took No. 32041 near a tree that contained three young Screech Owls.
*Otus flammeolus flammeolus(Kaup).—Specimens examined:total 2: ♂ 31600 from 20 mi. S Ocampo, 6000 ft., April 4, 1954; and ♂ 31581 from 13 mi. E San Antonio de las Alazanas, 9345 ft., April 9, 1954.
Miller (1955a:163) collected seven Flammulated Owls in the pines and oaks at 7000 feet in Carboneras Canyon and said that these owls were common there. Nos. 31600 and 31581 are suffused with cinnamoneous pigmentation, but represent the grayish phase, as described by Ridgway (1914:729). Van Hoose (1955:302) previously recorded Nos. 31600 and 31581 from Coahuila.
*Bubo virginianus pallescensStone.—Specimens examined:total 2: ♀ 32042 from 2 mi. S, 12 mi. E Nava, June 15, 1952; measurements: wing, 367 mm.; tail, 233 mm.; culmen, 29 mm.; and ♂ 31677 from 1.5 mi. NE Las Margaritas, 3100 ft., May 31, 1954; measurements: wing, 345 mm.; tail, 213 mm.; culmen, 26 mm.; testes, 8 mm. long.
Miller (1955a:164) took a male Great Horned Owl in the Sierra del Carmen on April 22. Ridgway (1914:742) listedB. v. pallescensfrom Sabinas. Sutton and Burleigh (1939a:30) obtained a female "near San Pedro" on January 29. Friedmann, Griscom, and Moore (1950:143) recordedB. v. pallescensfrom Coahuila on February 24, May 26, and June 10. The record ofB. v. mayensisfrom Las Delicias (Amadon and Phillips, 1947:578) has been reidentified by Webster and Orr (1958:141) asB. v. pallescens. Dickerman saw a Great Horned Owl in the Sierra del Pino on May 12,1954.
*Glaucidium gnoma californicumSclater.—Specimen examined:one, ♂ 31582, from 20 mi. S Ocampo, 6500 ft., April 5, 1954, weight, 55 gms.
Concerning forms of Pygmy Owls, Miller (1955a:164) remarked that the best distinguishing characters ofG. g. gnomaandcalifornicumare tail length and wing length. The characters of No. 31582 (wing, 94 mm.; tail, 69 mm.) are clearly those ofcalifornicumand not those ofgnoma. Miller (loc. cit.) remarked that he "encountered at least five different individuals, chiefly in the pine-oak at 7000 feet" and one in oaks and piñons at 5000 feet in Boquillas Canyon of the Sierra del Carmen. The size of the testes (left, 9×5 mm.; right, 7×4 mm.) of No. 31582 indicates good probability of breeding by the Pygmy Owl in the State.
**Micrathene whitneyi(Cooper).—Miller (1955a:164) heard the Elf Owl at close range in oaks at 5000 feet in Boquillas Canyon of the Sierra del Carmen on April 24.
**Speotyto cunicularia hypugaea(Bonaparte).—Specimens examined:total 3: ♀ 32043 from 3 mi. S, 9 mi. E Cuatro Ciénegas, 2250 ft., June 30, 1952; ♂ 32653 from 6 mi. W San Antonio de las Alazanas, July 5, 1955; and [** Male] 31602 from 14 mi. W San Antonio de las Alazanas, 6500 ft., January 7, 1954.
Although there are no records in Coahuila of specimens of Burrowing Owls north of 3 mi. S and 9 mi. E Cuatro Ciénegas, this owl probably occurs in the northern section of the State. The records of Burrowing Owls from the southern part of Brewster County, Texas (Van Tyne and Sutton, 1937:38), suggest such occurrence. No. 31602 was shot in a prairie dog colony; No. 32043 was captured in a steel trap. Baker saw Burrowing Owls 7 mi. S and 4 mi. E Bella Unión, 7200 feet, on June 25, 1952.
*Caprimulgus vociferus arizonae(Brewster).—Specimens examined:total 4: ♂ 31449 and ♀ 31450 from Sierra del Pino (=5 mi. S, 3 mi. W Acebuches), May 12 and 15, 1954, weights, 48 and 42 gms.; and ♂ ♂ 31028-31029 from 2 mi. N, 18 mi. W Santa Teresa, 7250 ft., April 3, 1952.
The Whip-poor-will occurs between 5000 feet and 9000 feet in Coahuila. Miller (1955a:164) reportedC. v. arizonaein the Sierra del Carmen. Ridgway (1914:521) stated thatAntrostomus vociferus macromystax(=C. v. arizonae) occurs in the southeastern sector of Coahuila at Sierra Guadalupe. Burleigh and Lowery (1942:190) reported the Whip-poor-will "near the summit of Diamante Pass"; because of its size (wing, 170 mm.; tail, 135 mm.) this Whip-poor-will from Diamante Pass seems to represent the subspeciesarizonae. Dickerman saw four Whip-poor-wills 20 mi. S Ocampo, 6000 feet, on April 4, 1954. The sizes of the testes of Nos. 31449, 31028, and 31029 (13, 12, and 13 mm. long) and an egg taken from No. 31450 indicate breeding by this species in the State.
*Phalaenoptilus nuttallii nuttallii(Audubon).—Specimens examined:total 6: ♂ 31032 from 37 mi. S, 21 mi. E Boquillas, 4100 ft., March 12, 1952; ♂ 31446 and ♀ 31447 from Sierra del Pino (=5 mi. S, 3 mi. W Acebuches), 6200 ft., May 13, 1954; ♂ ♂ 32048-32049 from 2 mi. S, 11 mi. E Nava, June 16, 1952; and ♀ 31033 from 4 mi. W Hacienda La Mariposa, 2300 ft., March 26, 1952.
Miller (1955a:164) found the Poor-will common along the rocky canyon walls up to 5000 feet in the Sierra del Carmen. Ridgway (1914:550) recorded the Poor-will at Sabinas on May 21 and at Saltillo on May 6. Van Tyne and Sutton (1937:39) stated thatP. n. nuttalliiwas not common in the Big Bend Country of Texas; this probably is true for northwestern Coahuila as well. The specimens from the Sierra del Pino, collected by Dickerman in a pine-oak association at 6200 feet, were taken near the upper limit of their range. Findley saw Poor-wills 2 mi. W Jiménez, 850 feet, on June 19, 1952; 2 mi. S and 11 mi. E Nava, 810 feet, on June 15, 1952; and 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952. Dickerman noted Poor-wills 16 mi. E and 18 mi. N Ocampo on May 7, 1954, and 20 mi. S Ocampo, 6000 feet, on April 4, 1954.
The size of the testes (9×5 mm.) of No. 31446 and an enlarged oviduct and an ovum (4 mm. in diameter) of No. 31447 indicate breeding by the Poor-will in Coahuila.
**Chordeiles minor howelliOberholser.—Specimen examined:one, ♂ 31443, from 3 mi. N, 4 mi. E San Francisco (=25 mi. N Ocampo), 4850 ft., May 16, 1954.
Van Hoose (1955:302) wrote that nighthawks were heard and seen frequently 3 mi. N and 4 mi. E San Francisco. Blake (1953:227) said that the Common Nighthawk breeds in Sonora, Chihuahua, Tamaulipas, and Durango; the size of the testes (7×4.5 mm.) of No. 31443 indicates the possibility of breeding by this species in the State.
*Chordeiles acutipennis texensisLawrence.—Specimens examined:total 4: ♂ 32044 and ♀ 32045 from 2 mi. W Jiménez, 850 ft., June 20, 1952; ♀ 31442 from 5 mi. N, 13 mi. E Ocampo, May 6, 1954; and ♂ 32046 from 2 mi. N, 1 mi. W Ocampo, 4050 ft., July 6, 1952.
Specimens of the Lesser Nighthawk, subspeciesC. a. texensis, have been recorded in the literature from representative localities throughout most of Coahuila. Burleigh and Lowery (1942:190-191) obtained, on April 18, at "a small pond at the edge of Saltillo," one male that was exceedingly fat; they (loc. cit.) suggested that their specimen was a migrant. Goldman (1951:377, 389) stated thatC. a. texensisoccupied the Lower and Upper Sonoran and Upper Austral life-zones of Coahuila. Dickerman saw Lesser Nighthawks at San Marcos (=20 mi. S Cuatro Ciénegas) on May 4, 1954. Van Tyne and Sutton (1937:41) reported that the Lesser Nighthawk was common throughout the lower parts of the Big Bend in Texas. This is probably true for northwestern Coahuila as well.
The presence of an egg in the oviduct of No. 32045 and the dates (May 6, June 20, and July 6) on which Nos. 31442, and 32044-32046 were obtained indicate breeding by this species in Coahuila.
**Aëronautes saxatalis saxatalis(Woodhouse).—Specimen examined:one, ♂ 31672, from Pico de Jimulco, 5600 ft., April 5, 1953, weight, 35 gms.
Burleigh and Lowery (1942:191) found the White-throated Swift to be common at "the summit of Diamante Pass and on the nearby ridges." Miller (1955a:164) saw the species from 4800 feet up to the crest of the Sierra del Carmen. Several White-throated Swifts were seen flying overhead at Pico de Jimulco on April 5.
No specimens ofA. s. sclaterifrom México are known. Miller (1955a:165) listed one specimen with dimensions (wing, 145 mm.) that approachessclateri. The measurements of No. 31672 (wing, 143 mm.; tail, 58 mm.) also approach the dimensions of specimens ofsclateribut are best referred toA. s. saxatalis.
**Calothorax lucifer(Swainson).—Burleigh and Lowery (1942:191) obtained a male Lucifer Hummingbird at the Chorro del Agua on April 19. Van Tyne and Sutton (1937:43) reported a male from the Río Grande (=3 mi. W Boquillas, Texas).
Archilochus colubris(Linnaeus).—Friedmann, Griscom, and Moore (1950:180) remarked that the Ruby-throated Hummingbird is a moderately common migrant, wintering from sea level to 9350 feet throughout México, except in a few states. The only published record of a specimen of this hummer in the State is of a male taken on April 22 in a small arroyo twenty miles west of Saltillo (Burleigh and Lowery, 1942:191).
*Archilochus alexandri(Bourcier and Mulsant).—Specimens examined:total 2: ♂ 31035 from the Río Grande (=17 mi. S Dryden, Terrell County, Texas, in Coahuila), 600 ft., March 18, 1952; and ♂ 32052 from 2 mi. S, 11 mi. E Nava, 810 ft., June 16, 1952.
Miller (1955a:165) stated the Black-chinned Hummingbird was common in the desert area at the base of the mountains of the Sierra del Carmen, and that Marsh, on July 25, obtained this hummingbird "near Piedra Blanca (Conejo)." Burleigh and Lowery (1942:191) obtained a female in an arroyo about twenty miles west of Saltillo on April 22.
**Selasphorus platycercus platycercus(Swainson).—Specimens examined:total 2: ♂ 31583 from 20 mi. S Ocampo, 6500 ft., April 4, 1954; and ♀ 32673 from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955.
Miller (1955a:165) indicated that the Broad-tailed Hummingbird was fairly common in the Sierra del Carmen. According to Burleigh and Lowery (1942:191) this species is not uncommon in the pine woods bordering the summit of Diamante Pass; they saw the bird between 4900 and 10,000 feet.
*Eugenes fulgens fulgensBoucard.—Miller (1955a:165) obtained a male Rivoli's Hummingbird on Loomis Peak, 8800 feet, on April 11 in the Sierra del Carmen.
**Lampornis clemenciae clemenciae(Lesson).—Specimens examined:total 2: ♂ 31036 from 26 mi. W Santa Teresa, 7050 ft., April 5, 1952; and ♀ 32668 from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955.
The Blue-throated Hummingbird occurs between 5000 and 9950 feet in Coahuila. Miller (1955a:165) remarked that it was found in canyon bottoms, "whether at 7500 feet among the rocky slopes, oaks, and white pines ... or at 5000 feet in the madrone, maples, elms, and basswoods...." No. 32668, was obtained in a Douglas fir-pine-aspen association at 9950 feet.
[Amazilia yucatanensis chalconotaOberholser.—The Buff-bellied Hummingbird seems to be uncommon in Coahuila. Friedmann, Griscom, and Moore (1950:172) and the AOU Check-list Committee (1957:306) stated that this hummingbird occurs in Coahuila.]
Megaceryle alcyon alcyon(Linnaeus).—Miller (1955a:165) saw a Belted Kingfisher at Carboneras Canyon in the Sierra del Carmen. Miller, Friedmann, Griscom, and Moore (1957:15) stated that one specimen ofM. a. alcyonwas obtained in Coahuila on November 14.
**Chloroceryle americana hachisukai(Laubmann).—Specimens examined:total 2: ♀ 32053 from 12 mi. N, 12 mi. W Jiménez, June 19, 1952; and ♀ 31038 from 8 mi. N, 4 mi. W Múzquiz, 1800 ft., March 31, 1952.
The Green Kingfisher has been recorded in Coahuila as far south as 8 mi. N and 4 mi. W Múzquiz. The forehead of No. 31038, when compared with typical representatives ofC. a. hachisukai, is not extensively streaked with white, nor are all the coverts conspicuously spotted with white, yet it clearly has more extensive white markings than typical representatives ofC. a. septentrionalis. This specimen from 8 mi. N and 4 mi. W Múzquiz probably is intermediate betweenhachisukaiandseptentrionalis. Miller (1955a:165) stated that Marsh took a specimen at Tanque de los Melones on La Bavia Ranch east of Fresno Mesa in the Sierra del Carmen that is a typicalC. a. hachisukai.
Colaptes cafer collarisVigors.—Ridgway (1914:34) listed this subspecies of the Red-shafted Flicker from Saltillo and Agua Nueva.
*Colaptes cafer nanusGriscom.—Specimens examined:total 3: ♀ 31463 from Sierra del Pino (=5 mi. W, 3 mi. S Acebuches), May 13, 1954, weight, 108 gms.; and ♂ 31651 and ♀ 31652 from the north foot of Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 6500 ft., April 21, 1953.
In suitable habitats in Coahuila the Red-shafted Flicker is common. Miller (1955a:165-166) stated thatC. c. nanuswas common at Corte Madera Canyon, Boquillas Canyon, and Carboneras Canyon in the Sierra del Carmen and recorded a specimen also from Sierra de Jardín on August 7. Burleigh and Lowery (1942:192) recordedC. c. nanusfrom Diamante Pass and Saltillo. Sutton and Burleigh (1939a:31) stated that the Red-shafted Flickers, obtained 5 mi. E La Rosa and at Diamante Pass, may be intermediate betweenC. c. collaris(then calledC. c. chihuahuae) andC. c. nanus. Nesting of the Red-shafted Flicker in Coahuila was reported by Miller (1955a:165) and Burleigh and Lowery (1942:192). Hardy saw Red-shafted Flickers 13 mi. E San Antonio de las Alazanas on July 6, 1955.
*Centurus aurifrons aurifrons(Wagler).—Specimens examined:total 6: ♂ 32054 from 12 mi. N, 12 mi. W Jiménez, 850 ft., June 19, 1952; ♀ ♀ 32055-32057 from 2 mi. W Jiménez, 850 ft., June 20, 1952; ♀ 31039 from 8 mi. N, 4 mi. W Múzquiz, 1800 ft., April 1, 1952; and ♂ 33150 (skeleton only) from Parras, July 4, 1955.
The Golden-fronted Woodpecker occurs throughout Coahuila, but uncommonly in the western part. Wetmore (1948:185-186) examined a series of Golden-fronted Woodpeckers that showed a definite cline in dorsal coloration from north-central Texas to Jalisco, Michoacán, and Hidalgo in south-central México. He (loc. cit.) stated that "the extremes are easily separable, but in southern and southwestern Texas and in northeastern Mexico the two kinds [C. a. aurifronsandC. a. incanescens] ... merge so gradually that over a broad area the whole population is intermediate, making decisions as to any sharply drawn dividing line difficult and in part arbitrary."C. a. incanescens, according to Wetmore, occurs in western and central Texas south to northeastern Chihuahua and northern Coahuila whereasC. a. aurifronsoccurs in north-central Coahuila (Monclova) and southern Texas south to Jalisco, Michoacán, Hidalgo, and central Tamaulipas.
The specimens that I have examined from Coahuila are variably intermediate between the subspeciesaurifronsandincanescens. The dark and white cross-bars on the back of No. 31039 are nearly equal (dark bands wider inaurifrons; white bands wider inincanescens); the rump and upper tail coverts are more or less mixed with black as inaurifrons. The dark cross-bars on the backs of Nos. 32054-32057 are slightly larger than the white cross-bars; the rump and upper tail coverts of these specimens are somewhat mixed with black.
*Centurus aurifrons incanescensTodd.—This subspecies of the Golden-fronted Woodpecker is listed by Miller, Friedmann, Griscom, and Moore (1957:34) from "... northern Coahuila (upper Río Grande valley)." Burleigh and Lowery (1942:192) stated that the Golden-fronted Woodpecker "apparently avoids the mountain slopes, but was found to be not uncommon on the arid plateau about Saltillo." Findley saw Golden-fronted Woodpeckers 2 mi. W Jiménez, 850 feet, on June 19, 1952; and 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952. Cory (1919:424) listed the Golden-fronted Woodpecker from Sabinas. Nos. 32055-32057 are juveniles, and thus document breeding by this woodpecker in Coahuila.
*Melanerpes formicivorus formicivorus(Swainson).—Specimens examined:total 5: ♂ 31040 (skeleton only) from Fortín (=33 mi. N, 8 mi. W San Gerónimo), 3300 ft., March 28, 1952; ♂ 29423 and ♀ 29424 from Club Sierra del Carmen (=2 mi. N, 6 mi. W Piedra Blanca), 4950 ft., April 8, 1950; ♀ 31041 (skeleton only) from 26 mi. W Santa Teresa, 7050 ft., April 5, 1952; and ♀ 31668 from Sierra Guadalupe, Cañon d. Meco (=10 mi. S General Cepeda), 6500 ft., April 23, 1953.
The Acorn Woodpecker in Coahuila is common in the oak and pine-oak belts, from 4950 to 8000 feet. Miller (1955a:166) stated that the Acorn Woodpecker in the Sierra del Carmen was an abundant and conspicuous bird throughout the oak and pine-oak belts, from 5000 to 8000 feet. Dickerman saw two Acorn Woodpeckers in the Sierra de la Madera on December 13, 1953, and four 20 mi. S Ocampo, 6000 feet, on April 4, 1954. Breeding ofM. f. formicivoruswas reported by Miller (loc. cit.) who took females nearly ready to begin laying; one of our specimens (No. 29423) had enlarged testes (11 mm.).
Sphyrapicus varius varius(Linnaeus).—Specimen examined:one, ♀ 31649, from the north foot of Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 6400 ft., April 19, 1953.
Miller (1955a:166) reported this Yellow-bellied Sapsucker as a winter visitant or migrant in the Sierra del Carmen. Burleigh and Lowery (1942:192) took a femaleS. v. variusat the summit of Diamante Pass on April 14. Ridgway (1914:275) listedS. v. variusfrom Sierra de Guadalupe.
Sphyrapicus varius nuchalisBaird.—Miller (1955a:166) reported this Yellow-bellied Sapsucker as "indeed common" in the Sierra del Carmen, and indicated that bothS. v. nuchalisandS. v. variuswere "found only at the upper levels in the pine-oak formation and usually in relatively dense clumps of trees in the canyon bottoms." Ridgway (1914:280) listedC. v. nuchalisfrom Río Sabinas.
**Dendrocopos villosus icastus(Oberholser).—Miller, Friedmann, Griscom, and Moore (1957:39) remarked that this subspecies of the Hairy Woodpecker occurs, in northwestern México, from eastern Sonora, Jalisco, Chihuahua, Durango, Zacatecas to southern Coahuila. Ridgway (1914:222) stated thatD. v. icastusoccurs in Coahuila at Carneros and Sierra de Guadalupe, the former being the easternmost known locality for the subspecies.
**Dendrocopos villosus intermedius(Nelson).—Specimens examined:total 2: ♂ 32701 from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955; and ♀ 31604 from 2 mi. E Mesa de Tablas, 8500 ft., January 15, 1954.
In northeastern México this subspecies, according to Miller, Friedmann, Griscom, and Moore (1957:39), occurs in Guanajuato, San Luis Potosí, Hidalgo, Nuevo León, and Tamaulipas. Nos. 31604 and 32701 represent the first records ofD. v. intermediusfrom Coahuila.
*Dendrocopos scalaris cactophilus(Oberholser).—Specimens examined:total 2: ♀ 31042 from 7 mi. S, 2 mi. E Boquillas, 800 ft., March 1, 1952; and ♀ 31043 from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 3, 1952.
These specimens of the Ladder-backed Woodpecker show signs of intergradation withD. s. symplectus. Both specimens are pale enough above forD. s. symplectus, but the wing and the tail of each (wing, 102, 103 mm.; tail, 60, 65 mm.) are too long forsymplectus. This suggestion of intergradation is not unexpected becausesymplectusoccurs in northeastern Coahuila andcactophilusin the Chisos Mountains of Texas. Miller (1955a:166) also obtained one femaleD. s. cactophilusfrom the Sierra del Carmen that suggested intergradation withsymplectus.
Miller (loc. cit.) wrote thatD. c. cactophiluswas found chiefly in the oaks and was common in the lower oak belt at 5000 feet. The upper limit of the range of the Ladder-backed Woodpecker, according to Miller, is 6800 feet. He reported the species as breeding in the Sierra del Carmen.
Miller (1955b:317) took a hybrid woodpecker representing a cross betweenDendrocopos villosusandDendrocopos scalarisin the Sierra del Carmen, where, although Ladder-backed Woodpeckers were common, he found no Hairy Woodpeckers.
**Dendrocopos scalaris symplectus(Oberholser).—Specimens examined:total 2: ♂ 32058 from 2 mi. W Jiménez, June 20, 1952; and ♂ 31667 from Sierra Guadalupe, Domingo Canyon (=10 mi. S, 14 mi. W General Cepeda), 6700 ft., April 18, 1953.
This Ladder-backed Woodpecker, according to the AOU Check-list Committee (1957:327) and Oberholser (1912:156), occurs in Texas (east of Pecos), northeastern Coahuila, Nuevo León, and Tamaulipas. The area of intergradation ofD. s. symplectusandgiraudiis in southeastern Coahuila. The dark smoky underparts and the equal size of the white and black bars of the upper parts of No. 31667 suggest intergradation withD. s. giraudi. Yet, the size of the wing indicates that this specimen is closer toD. s. symplectus. No. 32058 has characters of typical representatives ofD. s. symplectus. Burleigh and Lowery (1942:193) reportedD. s. symplectus"in the desert country west of Saltillo." Ridgway (1914:257) listed the Ladder-backed Woodpecker from Sabinas. Cory (1919:494) listedD. s. symplectusfrom Pabinas (=Sabinas?).
**Dendrocopos scalaris giraudi(Stone).—Specimen examined:one, ♂ 34623, from 12 mi. N, 10 mi. E Parras, 3850 ft., July 12, 1953, weight, 35 gms.
Ridgway (1914:259) reported thatD. s. giraudi(then calledDryobates scalaris bairdi) has been recorded from La Ventura, Carneros, and Jaral. Oberholser (1912:159) indicated that the subspeciesgiraudioccurs north to Jaral in southern Coahuila, east to La Ventura in southeastern Coahuila, and south through central México. The present specimen is darker ventrally than specimens of eitherD. s. cactophilusorD. s. symplectus, and on its upper surface the black bars are wider than the white. The specimen is in worn plumage, but nevertheless suggests intergradation withD. s. symplectus.
Platypsaris aglaiae albiventris(Lawrence).—The Rose-throated Becard, if it occurs in Coahuila at all, is rare in the State. Without giving any specific locality, Sclater (1857:74) describedPachyrhamphus aglaiaefrom Coahuila. Hellmayr (1929:202) considered Sclater's record as representingPlatypsaris aglaiae albiventris(Lawrence).
*Tyrannus vociferans vociferans(Swainson).—Specimens examined:total 2: ♂ 32064 from 7 mi. S, 4 mi. E Bella Unión, 7200 ft., June 24, 1952; and ♀ 31650 from the north foot of Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 6400 ft., April 15, 1953.
The small number of records of Cassin's Kingbird in Coahuila is surprising, for I would expect the species in most areas of the State between 6000 and 7000 feet. All Coahuilan records are from the southeastern part of the State. Burleigh and Lowery (1942:193) found it "on infrequent occasions in the arid country near Saltillo." Miller, Friedmann, Griscom, and Moore (1957:71) reported thatT. v. vociferansnested in Coahuila on July 7. The size of the testes (15×7 mm.) of our specimen from near Bella Unión also indicates breeding.
**Muscivora forficata(Gmelin).—Specimen examined:one, ♀ 32063, from 12 mi. N, 12 mi. W Jiménez, 850 ft., June 19, 1952.
The status of the Scissor-tailed Flycatcher in Coahuila is uncertain. Although the condition of the gonads of No. 32063 was not recorded by the collector, the late date (June 19) on which is was obtained suggests that this female was a resident in northeastern Coahuila. Findley saw a Scissor-tailed Flycatcher 2 mi. S and 11 mi. E Nava, 810 feet, on June 15, 1952. Dickerman saw one 4 mi. N San Isidro on May 10, 1954. Miller, Friedmann, Griscom, and Moore (1957:69) recorded this flycatcher from Sabinas on April 12. No other records ofMuscivora forficatain Coahuila have come to my attention, but the species probably occurs in the State in migration.
*Myiarchus crinitus crinitus(Linnaeus).—Specimens examined:total 3: ♀ 32065 from 12 mi. N, 12 mi. W Jiménez, 850 ft., June 19, 1952; and ♂ 32066 and ♀ 32067 from 2 mi. W Jiménez, 850 ft., June 20, 1952.
The Great Crested Flycatcher seems to be rare in Coahuila. Nos. 32065-32067 are the first specimens that I know of from Coahuila. Bangs (1898:179-180) said that the subspeciescrinitushas an "enormous swollen bill" (exposed culmen of male, 20 mm.; breadth of bill at middle of nostril, 10.3 mm.) whereasM. c. boreushas a "small slender bill" (exposed culmen of male, 18.6 mm.; breadth of bill at middle of nostril, 8.6 mm.). No. 32066 has a large bill (exposed culmen, 21 mm.; breadth of bill at middle of nostril, 10 mm.). Bangs (loc. cit.) did not give any measurements for females ofM. c. crinitusorboreus. Nevertheless, I suspect that Nos. 32065 and 32067 representcrinitus(No. 32065: exposed culmen, 19 mm.; breadth of bill at middle of nostril, 9 mm.; No. 32067: exposed culmen, 20 mm.; breadth of bill at middle of nostril, 9.5 mm.). The size of the testes (9 mm. long) of No. 32066 and the dates (June 19 and 20) on which the specimens were collected indicate breeding by this species in the State.
*Myiarchus tyrannulus cooperiBaird.—Specimens examined:total 2: ♂ 32068 and ♀ 32069 from 2 mi. S, 3 mi. E San Juan de Sabinas, 1160 ft., June 22, 1952, measurements: wing, 102, 97 mm.; tail, 93, 90 mm.
Wied's Crested Flycatcher is not common in Coahuila. Eastern Coahuila represents the eastern limit of the range ofM. t. cooperi. Measurements of our specimens agree well with the average measurements of typicalM. t. cooperi. According to Ridgway (1907:621),M. t. cooperi(then calledMyiarchus mexicanus mexicanus) has been recorded from Sabinas. The size of the testes (14×7 mm.) of No. 32068 and the date (June 22) on which the specimens were collected indicate breeding by this species in the State.
*Myiarchus cinerascens cinerascens(Lawrence).—Specimens examined:total 7: ♀ 31045 from 15 mi. SE Boquillas, 1500 ft., March 16, 1952; ♂ 32070 from 12 mi. N, 12 mi. W Jiménez, 850 ft., June 19, 1952; ♀ 32071 from 2 mi. W Jiménez, 850 ft., June 20, 1952; ♂ 35413 from 6 mi. N, 2 mi. W Castillón, 3750 ft., June 30, 1953; ♂ 32072 from 9 mi. S, 11 mi. E Sabinas, June 14, 1952; ♀ 31584 from 17 mi. S Ocampo, 5300 ft., April 7, 1954; and ♂ 31673 from the west foot of Pico de Jimulco, 5000 ft., April 4, 1953.
The Ash-throated Flycatcher is common in Coahuila. All specimens examined by me from there are typical ofM. c. cinerascens. Ridgway (1907:626) listedM. c. cinerascensfrom Monclovia (=Monclova?) and Sabinas. Miller (1955a:166) found the species "only in the oak belt at 5000 feet, where it was common." Burleigh and Lowery (1942:193) recordedM. c. cinerascensfrom "near Saltillo." Dickerman obtained No. 31584 in a mesquite-grassland-shrubby area. Miller, Friedmann, Griscom, and Moore (1957:78) stated thatM. c. cinerascensbreeds in Coahuila.
Sayornis phoebe(Latham).—Miller, Friedmann, Griscom, and Moore (1957:66) recorded the Eastern Phoebe from Coahuila on November 4-14.
*Sayornis nigricans semiatra(Vigors).—Specimens examined:total 2: ♀ 31046 from 1 mi. N Boquillas, 700 ft., March 7, 1952; and ♀ 31047 from Fortín (=33 mi. N, 8 mi. W San Gerónimo), 3300 ft., March 27, 1952.
Of the Black Phoebe, the two subspeciessemiatraandnigricansintergrade in Coahuila. Typical representatives ofS. n. semiatraare present in northern Coahuila. The under tail coverts of Nos. 31046-31047 are immaculate and white. Miller (1955:167) noted the two specimens collected from the Sierra del Carmen to have narrow dark shaft streaks on the under tail coverts. He (loc. cit.) remarked also that "the marking of the under tail coverts may indicate a beginning of a gradient in increased darkening of these feathers towardS. n. nigricansin southern Coahuila."
*Sayornis nigricans nigricans(Swainson).—Burleigh and Lowery (1942:193) collected several specimens ofS. n. nigricans"on the outskirts of Saltillo" and saw a pair at the Chorro del Agua on April 19.
*Sayornis saya saya(Bonaparte).—Specimens examined:total 4: ♀ 31049 from the Río Grande (=17 mi. S Dryden, Terrell Co., Texas, in Coahuila), 600 ft., March 18, 1952; sex ? 31048 from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 4, 1952; ♂ 31050 from Fortín (=33 mi. N, 8 mi. W San Gerónimo), 3300 ft., March 29, 1952; and ♀ 32059 from 7 mi. S, 4 mi. E Bella Unión, 7200 ft., June 25, 1952.
Say's Phoebe occurs commonly in Coahuila. Miller (1955a:167) obtained a female with an active brood patch in Boquillas Canyon of the Sierra del Carmen, and remarked that Marsh took a juvenile on September 2 at El Rincón. Sutton and Burleigh (1939a:33) saw this phoebe several times in southern Coahuila and obtained a male "near San Pedro" on January 29. Burleigh and Lowery (1942:193) recorded this species as "a common breeding bird both on Diamante Pass and on the arid plateau around Saltillo." No. 32059 was a juvenile.
Empidonax traillii brewsteriOberholser.—Amadon and Phillips (1947:578) look a Traill Flycatcher of the subspeciesbrewsteriat Las Delicias on August 11.
Empidonax minimus(Baird and Baird).—Specimen examined:one, ♂ 31470, from Sierra del Pino (=5 mi. S, 3 mi. W Acebuches), 6200 ft., May 13, 1954.
Amadon and Phillips (1947:578) obtained two Least Flycatchers at Las Delicias on August 12. Dickerman took No. 31470 in pine-oak vegetation.
Empidonax hammondii(Xantus).—Specimen examined:one, sex ? 31657, from the north slope of Sierra Guadalupe (=11 mi. S, 7 mi. W General Cepeda), 7800 ft., April 20, 1953.
No. 31657 is similar toE. wrightii(Wright's Flycatcher); however, the outmost (tenth) primary is equal to or slightly larger than the fifth primary. Yet, the underparts of No. 31657 are darker and more uniform in coloration than those of typical representatives ofE. wrightii. Miller, Friedmann, Griscom, and Moore (1957:88) stated that Hammond's Flycatcher is "transient" in Coahuila. Burleigh and Lowery (1942:193-194) reported thatE. hammondiiwas the most prevalent of the small flycatchers in southeastern Coahuila. They (loc. cit.) obtained specimens of this flycatcher from the Chorro del Agua and Diamante Pass. Miller (1955a:167) characterizedE. hammondiias a common migrant, "chiefly in stands of low oaks in the pine-oak belt but also occasionally in the desert scrub" of the Sierra del Carmen.
Empidonax wrightiiBaird.—Amadon and Phillips (1947:578) reported one Wright's Flycatcher from Las Delicias. Miller (1955a:167) stated that this species was a common migrant and occurred chiefly in the lower oak belt and in the desert scrub. Sutton and Burleigh (1939a:34) obtained specimens ofE. wrightiifrom San Pedro on January 29.
Empidonax griseusBrewster.—Sutton and Burleigh (1939a:34) noted that the Gray Flycatcher was common "in the San Pedro region" and collected two at San Pedro on January 29. Burleigh and Lowery (1942:194) collected specimens "near the Chorro del Agua, at Saltillo, and ... in the open desert some twenty miles west of Saltillo."
**Empidonax affinis trepidusNelson.—Specimen examined:one, ♂ 32750, from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955.
Ridgway (1907:576) previously reported the little known and poorly defined Pine Flycatcher from Sierra Guadalupe. Because of its small size (wing, 75 mm.; tail, 65 mm.), No. 32750 is referable toE. a. trepidus. No indication of breeding of the subspeciestrepidusexists for Coahuila. Nevertheless, the date (July 6) on which No. 32750 was obtained suggests that this flycatcher may breed in southeastern Coahuila.
*Empidonax difficilis hellmayriBrodkorb.—Specimen examined:one, ♂ 31469, from Sierra del Pino (=5 mi. S, 3 mi. W Acebuches), May 13, 1954, measurements: wing, 71 mm.; tail, 65 mm.; culmen, 11.5 mm.; tarsus, 17.0 mm.
Miller (1955a:167) reported that the Western Flycatcher breeds in the Sierra del Carmen, from 6800 to 7500 feet. According to Miller, Friedmann, Griscom, and Moore (1957:91), this subspecies has been recorded from Sierra Guadalupe. No. 31469 closely resembles, especially in measurements, the specimens of the Western Flycatcher from the Chisos Mountains of Texas as reported by Brodkorb (1935:2).
Empidonax difficilissubsp.—Burleigh and Lowery (1942:194) obtained a specimen ofE. difficilis"near the summit of Diamante Pass" that they tentatively identified asE. d. salvini. However, they considered the specimen as possiblyE. d. immemoratusorE. d. occidentalis.
Localities listed by Miller, Friedmann, Griscom, and Moore (1957:92) ofE. d. salviniandE. d. immemoratusare south of twenty-three degrees north latitude whereas the range ofE. d. occidentalisincludes parts of Nuevo León north of twenty-three degrees north latitude (occidentalisintergrades withhellmayriat Cerro Potosí, Nuevo León, [Miller, Friedmann, Griscom, and Moore,loc. cit.]). Thus, the specimen from Diamante Pass probably is eitherE. d. hellmayriorE. d. occidentalis.
**Empidonax fulvifrons pygmaeusCoues.—Miller, Friedmann, Griscom, and Moore (1957:95) listed this subspecies of the Buff-breasted Flycatcher from the Sierra Guadalupe on April 21. This record represents the eastern limit of the range ofE. f. pygmaeusin northeastern México.
**Contopus pertinax pertinaxCabanis and Heine.—Burleigh and Lowery (1942:194) obtained one female Coues' Flycatcher "in a small gully just below the summit of Diamante Pass."
Contopus virens(Linnaeus).—I judge from the paucity of records in the literature that the Eastern Wood Pewee is uncommon in Coahuila. Burleigh and Lowery (1942:194) obtained two males at the Chorro del Agua, and remarked also that "it is possible that as far west as Saltillo, this species is a rather uncommon transient." Ridgway (1907:519) listedContopus virensfrom Sabinas.
*Contopus sordidulus velieiCoues.—Specimens examined:total 2: ♂ 31467 from Sierra del Pino (=5 mi. S, 3 mi. W Acebuches), May 14, 1954; and ♂ 31653 from the north foot of Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 6400 ft., April 19, 1953.
Specimen No. 31467 of the Western Wood Pewee was obtained in pine and oak vegetation by Dickerman. Ridgway (1907:523) reportedContopus sordidulus veliei, under the nameMyiochanes richardsonii richardsonii, from Sierra Encarnación. Amadon and Phillips (1947:578) obtained a specimen ofC. sordidulusfrom Las Delicias. Miller, Friedmann, Griscom, and Moore (1957:83) remarked that the Western Wood Pewee breeds in the State.
Nuttallornis borealis(Swainson).—Several records of the Olive-sided Flycatcher from Coahuila are present in the literature. Miller (1955a:167) reported it as a migrant in the desert at the base of the Sierra del Carmen on April 24. Miller, Friedmann, Griscom, and Moore (1957:82) reported this species from Ocampo on June 16. Amadon and Phillips (1947:578) obtained one at Las Delicias on August 16. Burleigh and Lowery (1942:194) collected two males "near the summit of Diamante Pass" on April 14.
*Pyrocephalus rubinus mexicanusSclater.—Specimens examined:total 3: ♂ 32060 and ♀ 32061 from 12 mi. N, 12 mi. W Jiménez, 850 ft., June 19, 1952; and sex ? 32062 from 2 mi. W Jiménez, 850 ft., June 20, 1952.
The Vermilion Flycatcher is common in Coahuila. Except in the northwestern part of the State, the subspeciesmexicanusis present throughout Coahuila. The size of No. 32060 (wing, 80 mm.; tail, 62 mm.) suggests that the specimen is an intergrade betweenP. r. flammeusandmexicanus.P. r. flammeusandmexicanusseem to intergrade in northern Coahuila.
Burleigh and Lowery (1942:195) foundmexicanusto be "quite plentiful on the plains surrounding Saltillo." Sutton and Burleigh (1939a:33) noted the Vermilion Flycatcher "near San Pedro." Cory and Hellmayr (1927:92) listedP. r. mexicanusfrom Sabinas. The size of the testes (6×4 mm. long) of No. 32060 and the dates (June 19 and 20) on which our specimens were collected indicate breeding.
Pyrocephalus rubinus flammeusvan Rossem.—This subspecies of Vermilion Flycatcher occupies the northwestern section of Coahuila. Marsh and Stevenson (1938:287) took a specimen ofP. r. flammeus"near Santo Domingo, east of the Del Carmens...." Miller (1955a:167) re-examined this specimen and stated that "its affinity with the northwest race of the species seems correct in terms of the characters outlined by van Rossem (1934:353)."
Eremophila alpestris enthymia(Oberholser).—Miller, Friedmann, Griscom, and Moore (1957:105) recorded this subspecies of Horned Lark wintering 4 mi. S Hipólito (November 2 to February 24). They reported also thatE. a. enthymiabreeds in Coahuila (4 mi. S Hipólito ?).
*Eremophila alpestris diaphora(Oberholser).—Specimens examined:total 9: ♂ ♂ 32073-32078 and ♀ 32079 from 7 mi. S, 4 mi. E Bella Unión, 7200 ft., June 25, 1952; and ♂ ♂ 31605-31606 from 14 mi. W San Antonio de las Alazanas, 6500 ft., January 9, 1954.
Burleigh and Lowery (1942:195) wrote that this subspecies of Horned Lark was uncommon "about Saltillo," but "fairly common" in Diamante Valley, at about 7000 feet. Oberholser (1902:863) recorded the subspeciesaphrastafrom La Ventura. Ridgway (1907:326) listedOtocoris alpestris aphrastaOberholser from Saltillo and La Ventura. However, Miller, Friedmann, Griscom, and Moore (1957:105) indicated thatE. a. diaphorarather thanaphrastawas recorded from Saltillo and La Ventura. Sutton and Burleigh (1939a:35) remarked that "specimens collected near Ramos Arizpe [in southeastern Coahuila]" proved to beE. a. aphrasta. However, this record might be questioned, as Miller, Friedmann, Griscom, and Moore (op. cit.) indicated, becausediaphora, rather thanaphrasta, seems to occupy the southeastern sector of Coahuila. Possibly typical representatives ofaphrastaand/or intergrades betweenaphrastaanddiaphoraare present in western Coahuila; however, no records ofE. a. aphrastaexist from western Coahuila.
The sizes of Nos. 32073-32077 and 31605-31606 (wing, 98.0-101.5 mm., averaging 99.7 mm.), the bright yellow throat, and the vinaceous color of the hindneck characterize clearly the subspeciesdiaphora. The sizes of the testes (9×6 mm.; 8×5 mm.; 10×6 mm.; 8×4 mm.; 11×6 mm.) of Nos. 32073-32077, the size of the largest ovum (6.5 mm.) of No. 32079, and the juvenile (32078) are evidence of breeding ofE. a. diaphorain Coahuila.
*Tachycineta thalassina thalassina(Swainson).—Specimens examined:total 3: ♂ 31471, ♂ 31473, and ♀ 31472 from Sierra del Pino (=5 mi. S, 3 mi. W Acebuches), May 15, 1954, measurements: wings, 125, 118, 108 mm.; tails, 56, 54, 46 mm.
The two subspecies of the Violet-green Swallow,thalassinaandlepida, intergrade in Coahuila. Specimens from different localities in the State represent various stages of intergradation between the two subspecies; generally those from northern Coahuila seem to be closer toT. t. lepida, and those from southern Coahuila are closer toT. t. thalassina. Nos. 31471-31473 are intergrades betweenT. t. thalassinaandT. t. lepida; in size the three resembleT. t. thalassina, but in green, rather than purple, backs and scapulars resembleT. t. lepida. The rumps of Nos. 31471-31473 show some purple with the green, but are nearerthalassinain this character.
Gonadal sizes (testes 10×7, 10×8 mm., one ovum 6 mm.) indicate that the Violet-green Swallow breeds in the Sierra del Pino.
*Tachycineta thalassina lepidaMearns.—Miller (1955a:167) reported that Violet-green Swallows taken in Boquillas Canyon of the Sierra del Carmen are intermediate betweenT. t. lepidaandthalassina; however, he referred his sample tolepidaon the basis of short wing.
Iridoprocne bicolor(Vieillot).—Miller, Friedmann, Griscom, and Moore (1957:114) reported the Tree Swallow from Hipólito on February 22.
Stelgidopteryx ruficollis psammochrousGriscom.—Miller, Friedmann, Griscom, and Moore (1957:111) reported this subspecies of the Rough-winged Swallow from Saltillo.
*Hirundo rustica erythrogasterBoddaert.—Burleigh and Lowery (1942:195) stated that the Barn Swallow was the most abundant swallow "about Saltillo." Because these swallows occupied houses about Saltillo and neighboring villages, Burleigh and Lowery (loc. cit.) concluded that the species nests commonly in the Saltillo area. Findley saw Barn Swallows 2 mi. S and 11 mi. E Nava, 810 feet, on June 15, 1952. Dickerman observed them at San Marcos (=20 mi. S Cuatro Ciénegas) on May 4, 1954.
*Petrochelidon pyrrhonota minimavan Rossem and Hachisuka.—Specimens examined:total 2: ♂ ♂ 31585-31586 from 14 mi. W San Antonio de las Alazanas, April 9, 1954.
Burleigh and Lowery (1942:196) noted the Cliff Swallow "in small numbers about Saltillo and the nearby villages" where the species "showed evidence of beginning to nest in many of the houses...." They (loc. cit.) found Cliff Swallows also at the Chorro del Agua and Diamante Valley. According to Dickerman, Nos. 31585-31586 were from a colony, members of which were collecting mud at a stock tank.
*Petrochelidon fulva pallidaNelson.—The Cave Swallow seems to be uncommon in eastern Coahuila. Selander and Baker (1957:345) list Saltillo, Sabinas, and Monclova as the three known localities for this swallow in the State.
*Progne subis subis(Linnaeus).—Miller, Friedmann, Griscom, and Moore (1957:107) reported, presumably on the basis of a published record not found by me, that the Purple Martin breeds in Coahuila.
**Progne chalybea chalybea(Gmelin).—The only record of the Gray-breasted Martin in Coahuila was given by Ridgway (1904:42) when he listedP. c. chalybeafrom Sabinas.
**Cyanocitta stelleri macrolophaBaird.—Specimens examined:total 2: ♂ 32788 and ♀ 32787 from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955.
From the paucity of records in the literature, I judge that Steller's Jay is uncommon in Coahuila. Nos. 32787-32788 seemingly represent the first records of this species in the State, and are referred to the subspeciesmacrolophaon the basis of relatively long (150, 151 mm.) wing, near the maximum forstellerifrom México. The date (July 6) of collection suggests that these birds were resident in southeastern Coahuila.
**Aphelocoma coerulescens cyanotisRidgway.—The Scrub Jay is common in southeastern Coahuila. Burleigh and Lowery (1942:196) noted this species in small numbers at the summit of Diamante Pass, daily on the lower slopes of the mountains, and a few birds "on the outskirts of Saltillo, where they were probably nesting...." Sutton and Burleigh (1939a:35) also noted several flocks at Diamante Pass. Miller, Friedmann, Griscom, and Moore (1957:123) reportedA. c. cyanotisfrom El Diamante. Ridgway (1904:335) listed this subspecies of the Scrub Jay (then calledAphelocoma cyanotis) from Carneros, Sierra Encarnación, and Sierra Guadalupe.
*Aphelocoma ultramarina couchii(Baird).—Specimens examined:total 14: ♀ 31051 from Sierra de la Encantada (=38 mi. S, 23 mi. E Boquillas), 4400 ft., March 15, 1952; ♂ ♂ 29425-29426 and ♀ ♀ 29427-29428 from Club Sierra del Carmen (=2 mi. N, 6 mi. W Piedra Blanca), 4950 ft., April 8, 1950; sex ? 31052 (skeleton only) from 4 mi. W Hacienda La Mariposa, 2300 ft., March 25, 1952; ♀ ♀ 31635-31636 from Canyon de Parazos in the Sierra de la Parazos Azula (=9 mi. E Hermanas), 2100 ft., December 7, 1953; ♀ 32082 from 4 mi. N, 21 mi. W Cuatro Ciénegas, 6200 ft., July 3, 1952; ♀ 31053 (skeleton only) from 26 mi. W Santa Teresa, 7050 ft., April 5, 1952; ♂ 32081 from 7 mi. S, 4 mi. E Bella Unión, 7200 ft., June 25, 1952; ♀ 33173 (skeleton only) from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955; ♂ 31607 from 13 mi. E, 3 mi. S San Antonio de las Alazanas, 8900 ft., January 11, 1954; and ♂ 31654 from Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 7000 ft., April 13, 1953.
The Mexican Jay is common in Coahuila. This species occupies various habitats in the State and has been collected at stations ranging from 2100 to 9950 feet.
Miller (1955a:167) stated that the Mexican Jay was the most abundant species of bird in the Sierra del Carmen. Burleigh and Lowery (1942:196) remarked that specimens ofA. u. couchiiwere obtained "in the area surrounding the summit of Diamante Pass." At no time did Burleigh and Lowery (loc. cit.) see this species below 6500 feet. The Mexican Jay is restricted to the higher altitudes in southern Coahuila but is more widespread in northern Coahuila. Dickerman saw Mexican Jays in the Sierra del Pino on May 12, 1954; 16 mi. E and 18 mi. N Ocampo on May 7, 1954; in the Sierra de la Madera on December 13, 1953; and 20 mi. S Ocampo on April 4, 1954.
Ridgway (1904:340) remarked thatAphelocoma sieberii potosinaNelson [=A. u. couchii(Baird)] has been recorded in southern Coahuila, at Carneros. Miller, Friedmann, Griscom, and Moore (1957:124) recordedA. u. couchiifrom Carneros, Nuevo León. I suspect (Ridgway, 1904:340 and Goldman, 1951: map opposite p. 34) that the locality given by Miller, Friedmann, Griscom, and Moore (op. cit.) should be Carneros, Coahuila, rather than Carneros, Nuevo León.
Specimens (31051, 29425-29428, 31635-31636, 32081-32082, 31607, and 31654) of the Mexican Jay increase in size from northern Coahuila to southern Coahuila. The average length of the wings of Nos. 29425-29426 from Club Sierra del Carmen is 152 mm. whereas the average length of the wings of No. 32081 from 7 mi. S and 4 mi. E Bella Unión, of No. 31607 from 13 mi. E and 3 mi. S San Antonio de las Alazanas, and of No. 31654 from Sierra Guadalupe is 164 mm.
Miller (1955a:169) indicated that the Mexican Jay breeds in the Sierra del Carmen. Burleigh and Lowery (1942:196) remarked that the species breeds at Diamante Pass. The sizes of the testes (12, 11 mm.) of Nos. 29425-29426, the size of the ovum (8 mm.) of No. 29428, and the short tail (126 mm.) of the immature female from 4 mi. N and 21 mi. W Cuatro Ciénegas are also evidence of breeding by this species in the State.
*Corvus corax sinuatusWagler.—The Common Raven seems to occur in low density in Coahuila. Miller (1955a:168) saw ravens in the pine-oak and cliff areas of the Sierra del Carmen, and took a breeding female at the head of Corte Madera Canyon, 7500 feet. Burleigh and Lowery (1942:196) found this species to be a bird of the higher slopes of the mountains although not uncommon in the broad open valley south of Diamante Pass. Sutton and Burleigh (1939a:35) took a male at Santa Rosa.
*Corvus cryptoleucusCouch.—Specimens examined:total 4: ♂ 32080 from 2 mi. W Jiménez, 850 ft., June 20, 1952; ♀ 35404 (skeleton only) from 4 mi. N San Isidro (=16 mi. N Ocampo), May 10, 1954; and ♂ ♂ 31474-31475 from R. de Almendárez (=53 mi. NW Ocampo), May 11, 1954.
The White-necked Raven occurs throughout Coahuila. Sutton and Burleigh (1939a:36) observed this species "in the vicinity of Saltillo," but not farther west. Burleigh and Lowery (1942:197) notedC. cryptoleucusfrequently "on the arid plateau around Saltillo" and obtained a specimen "in the high fertile valley south of Diamante Pass." Burleigh and Lowery (loc. cit.) remarked that the White-necked Raven avoids the mountain slopes; 7000 feet was the uppermost limit of occurrence. The sizes of the testes (32080, 20 mm.; 31474: left, 12×20 mm., right, 10x16 mm.; and 31475: left, 10×16 mm., right, 10×14 mm.) of the specimens that I have examined and the dates (May 11, June 20) on which they were collected indicate breeding by the White-necked Raven in Coahuila.
*Parus sclateri eidos(Peters).—Specimens examined:total 4: ♀ 32083 from 7 mi. S, 4 mi. E Bella Unión, 7200 ft., June 25, 1952; ♂ 31609 from 2 mi. E Mesa de Tablas, 9000 ft., January 15, 1954; ♂ 31656 and ♀ 31655 from the north slope of Sierra Guadalupe (=11 mi. S, 7 mi. W General Cepeda), 7800 ft., April 20, 1953.
The Mexican Chickadee is common in southeastern Coahuila. Miller, Friedmann, Griscom, and Moore (1957:133) stated thatP. s. eidosandP. s. sclateriintergrade in southern Coahuila. The specimens that I have examined also show signs of intergradation, but are closer toP. s. eidos.
Sutton and Burleigh (1939a:36) reported taking specimens ofP. s. eidosat Diamante Pass where they saw several individuals. Burleigh and Lowery (1942:197) also observed these chickadees "in the pine woods about the summit of Diamante Pass...." The size of the testes (6×5 mm.) of No. 31656 and the fact that No. 31655 was incubating eggs at the time it was obtained are evidence of breeding by this chickadee in the State.
**Parus sclateri sclateriKleinschmidt.—Miller, Friedmann, Griscom, and Moore (1957:133) stated that a specimen (or specimens?) ofP. s. sclateriwhich showed evidence of intergradation withP. s. eidoswas obtained at El Diamante.
**Parus atricristatus dysleptusVan Tyne.—Specimen examined:one, ♂ 31054 from 37 mi. S, 21 mi. E Boquillas, 4100 ft., March 13, 1952.
Two subspecies of the Black-crested Titmouse are present in Coahuila.P. a. dysleptusoccurs in northwestern Coahuila. Miller (1955a:168) stated that the Black-crested Titmouse, identified asdysleptus, was the only representative of the genusParusin the Sierra del Carmen. The weak extension of black onto the nape in No. 31054 suggests intergradation betweenP. a. dysleptusandP. a. atricristatus; the latter lacks the black nape ofdysleptus.
*Parus atricristatus atricristatusCassin.—Specimens examined:total 4: ♀ 32084 from 12 mi. N, 12 mi. W Jiménez, 850 ft., June 19, 1952; sex ? 32085 from 2 mi. W Jiménez, 850 ft., June 20, 1952; ♀ 31055 (skeleton only) from Fortín (=33 mi. N, 1 mi. E San Gerónimo), 3300 ft., on March 29, 1952; and ♀ 35399 (skeleton only) from 3.5 mi. W, 22 mi. S Ocampo, December 15, 1953, weight, 16 gms.
TypicalP. a. atricristatusoccurs in Coahuila in the southeastern sector (Dixon, 1955:184). Black-crested Titmice intermediate betweenatricristatusanddysleptuswere listed from Cuidad Múzquiz and Sabinas by Dixon (loc. cit.:189), asdysleptusbut were shown on his map (loc. cit.:184) asatricristatus. Our Nos. 32084 and 32085 (wing, 71, 71, tail, 63, 64 mm.) are small and fall in the upper range of size foratricristatusto which the specimens are here referred.
*Auriparus flaviceps ornatus(Lawrence).—Specimen examined:one, ♂ 31056, from Sierra de la Encantada (=38 mi. S, 23 mi. E Boquillas), 4400 ft., March 15, 1952.
The Verdin occurs up to about 5000 feet in Coahuila. Miller (1955a:168) reported that "this desert species followed the catclaw scrub up the washes to about 4800 feet, the limit of such habitat" in the Sierra del Carmen and also gave evidence of breeding by the Verdin in Coahuila. Amadon and Phillips (1947:578) reported a nest ofAuriparus flavicepsat Las Delicias. Burleigh and Lowery (1942:197) obtained a single specimen "in an arroyo a few miles east of Saltillo" and a single specimen "about twenty miles west" of Saltillo. Ridgway (1904:421) reportedA. f. ornatus[he referred to it asA. f. flaviceps] at Monclova. Hellmayr (1934:88) listedA. f. ornatusfrom Jaral. Findley saw a Verdin 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952.
The size (wing, 50 mm.; tail, 43 mm.) of No. 31056 is small for typical representatives ofA. f. ornatus. The yellow of the head of No. 31056 is darker than that of the other subspecies of the Verdin, and I have accordingly allocated the specimen toA. f. ornatus.
*Psaltriparus melanotis lloydiSennett.—Specimens examined:total 5: ♂ 31058 and ♀ 31057 from 37 mi. S, 21 mi. E Boquillas, 4100 ft., March 13, 1952; ♂ 31060 and ♀ 31059 from Sierra de la Encantada (=38 mi. S, 23 mi. E Boquillas), 4400 ft., March 15, 1952; and ♂ 35407 (skeleton only) from Sierra del Pino (=5 mi. W, 3 mi. S Acebuches), 6200 ft., May 14, 1954.
The Black-eared Bushtit is common in Coahuila. Typical representatives ofP. m. lloydiin the northern part of the State range from 4100 feet to 8000 feet. Miller (1955a:168-169) reportedP. m. lloydibreeding in the Sierra del Carmen. Marsh and Stevenson (1938:287) obtained a male in the Sierra del Carmen at El Jardín. The size of the testes (3.5 mm.) of No. 31058 suggests breeding by the Black-eared Bushtit 37 mi. S and 21 mi. E Boquillas.
**Psaltriparus melanotis iulusJouy.—Specimens examined:total 2: ♂ 31659 from the north slope of Sierra Guadalupe (=10 mi. S, 7 mi. W General Cepeda), 7000 ft., April 20, 1953; and ♀ 31658 from the north slope of Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 6700 ft., April 15, 1953.
Typical representatives of this Black-eared Bushtit are present in the southeastern sector of Coahuila. The backs of Nos. 31658-31659 differ slightly in color from the backs of typical representatives oflloydi. I suspect that the specimens from the Sierra Guadalupe are intergrades betweenlloydiandiulus.
Burleigh and Lowery (1942:197) took two males and two females ofPsaltriparus melanotis iulus(they called their specimensPsaltriparus minimus iulus) at Saltillo and stated that their specimens tended to approachlloydirather than being typicaliulus. Sutton and Burleigh (1939a:36) recordedP. m. iulusonly at Diamante Pass where they took two specimens.
*Sitta carolinensis nelsoniMearns.—Miller (1955a:169) reported that this subspecies of the White-breasted Nuthatch breeds and was common in the oaks and open conifers from 6500 to 8000 feet in the Sierra del Carmen and stated also that the populations of the White-breasted Nuthatch in "the Chisos Mountains [of Texas] and the Sierra del Carmen seem best regarded as a stage in the cline of whichnelsoniandmexicanaare end points, although falling closer tonelsoni."
*Sitta carolinensis mexicanaNelson and Palmer.—Specimens examined:total 2: ♂ 31669 and ♀ 31670 from the Cañon d. Meco, Sierra Guadalupe (=10 mi. S General Cepeda), 6500 ft., April 23, 1953, weights, 17, 18 gms.
Typical populations of this White-breasted Nuthatch occur in southern Coahuila. Ridgway (1904:449) listedS. c. mexicanafrom Sierra Guadalupe in southern Coahuila. The underparts of our specimens are darker than innelsoni, and their bills (culmen, 15, 13 mm.) are shorter than the average (♂, 19.8 mm.; ♀, 18.6 mm. [Ridgway, 1904:447]) innelsoni. The large size of the testes (5×3 mm.) of No. 31669 suggests breeding byS. c. mexicanain Sierra Guadalupe.
*Sitta pygmaea melanotisvan Rossem.—In Coahuila the Pigmy Nuthatch seems to be locally common. Miller (1955a:169) reported it so between 7500 and 8000 feet in pine-oak on the mesa tops and in the heads of canyons of the Sierra del Carmen and noted that it breeds there. Hardy saw the Pigmy Nuthatch 13 mi. E San Antonio de las Alazanas on July 6, 1955.
Certhia familiaris americanaBonaparte.—Specimens examined:total 2: ♀ 31612 from the base of Don Martín Dam, November 27, 1953, skull partially unossified; and ♀ 31587 from 20 mi. S Ocampo, 6500 ft., April 5, 1954, weight, 7 gms.
This subspecies of the Brown Creeper can be considered a sparse winter visitant to Coahuila. Van Hoose (1955:302) reported that Nos. 31612 and 31587 constitute the southernmost records ofC. f. americanaand represent the first records of occurrence ofamericanain México.
Certhia familiaris montanaRidgway.—Miller (1955a:169) reported this subspecies of the Brown Creeper, which he assumed to be a winter visitant or a migrant, in the Sierra del Carmen. He (loc. cit.) remarked also that the higher conifers would seem to constitute favorable habitat for nesting by the Brown Creeper, but did not find any evidence of a breeding population of creepers in the Sierra del Carmen. Miller, Friedmann, Griscom, and Moore (1957:143) reportedC. f. montanafrom San Lázaro Mountain on November 9.
**Certhia familiaris albescensBerlepsch.—Specimens examined:total 3: sex ? 32805 from 13 mi. E San Antonio de las Alazanas, July 7, 1955; ♂ ♂ 31610-31611 from 3 mi. S, 13 mi. E San Antonio de las Alazanas, 8900 ft., January 12, 1954.
Miller, Friedmann, Griscom, and Moore (1957:143) reportedC. f. albescensfrom "southern Coahuila." Nos. 31610-31611 and 32805 represent the only other records of this subspecies from the State. The date (July 7) on which No. 32805 was obtained suggests that this bird was a resident 13 mi. E San Antonio de las Alazanas.
Troglodytes aedon parkmaniiAudubon.—Specimen examined:one, sex ? 29556, from 1.5 mi. N Parras, 5500 ft., November 10, 1949, weight, 9.8 gms.
Burleigh and Lowery (1942:197) recorded the House Wren "in small numbers about Saltillo where occasional birds, presumably migrants, were noted in thickets or stretches of underbrush fringing cultivated fields." They obtained a single male "on the outskirts of Saltillo." Hellmayr (1934:218) listedT. a. parkmaniifrom Sabinas.
*Troglodytes brunneicollis cahooniBrewster.—Typical representatives of this subspecies of the Brown-throated Wren occur in northern Coahuila. In the Sierra del Carmen, Miller (1955a:170) foundT. b. cahoonithat in no way suggestedcompositusof the Sierra Madre Oriental. Burleigh and Lowery (1942:198) recorded acahooni-like specimen from Diamante Pass in southern Coahuila.
**Troglodytes brunneicollis compositusGriscom.—Specimen examined:one, ♂ 32819, from 13 mi. E San Antonio de las Alazanas, July 6, 1955.
The subspeciescahooniandcompositusof the Brown-throated Wren seem to intergrade in the southern part of the State. Although No. 32819 represents the subspeciescompositus, the somewhat whitish abdomen and the fairly large spots of the lesser wing coverts suggest some relationship withcahooni. In addition to the present record, Miller, Friedmann, Griscom, and Moore (1957:163) recordedT. b. compositusfrom southern Coahuila at Sierra Guadalupe. The record ofT. b. cahoonifrom Sierra Guadalupe (Ridgway, 1904:588) I suspect probably representsT. b. compositusor an intergrade betweencompositusandcahooni. The date (July 6) on which No. 32819 was obtained 13 mi. E San Antonio de las Alazanas suggests that this bird was resident there.
*Thryomanes bewickii eremophilusOberholser.—Specimens examined:total 3: ♂ 32088 from 2 mi. W Jiménez, 850 ft., June 20, 1952; ♀ 31061 from 4 mi. W Hacienda La Mariposa, 2300 ft., March 24, 1952, weight, 10.8 gms.; and ♂ 31660 from the north foot of Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 6500 ft., April 21, 1953, weight, 13 gms.
Bewick's Wren occurs commonly in Coahuila. Miller, Friedmann, Griscom, and Moore (1957:160) reported that, in Coahuila,T. b. eremophilus"intergrades in the eastern and southern sections withT. b. cryptusandT. b. murinus, respectively." The slightly darker coloration of No. 31660, suggesting a resemblance toT. b. murinus, is the only evidence of intergradation ofT. b. murinusanderemophilusthat I have found.
Miller (1955a:170) stated thatT. b. eremophiluswas "common in the piedmont area on yucca-dotted slopes and along the lower canyon walls in growth of piñon, yucca, and cactus" in the Sierra del Carmen, and reported breeding there. Burleigh and Lowery (1942:198) remarked thatT. b. eremophilus"proved without question to be the most widely distributed and abundant wren" in the Saltillo region. The series that Burleigh and Lowery (loc. cit.) assembled "proved to be uniform and clearly referable to"T. b. eremophilus. Sutton and Burleigh (1939a:36) notedThryomanes bewickiiat San Pedro on January 29 and 30. Hardy saw a maleT. b. eremophilusat Parras on July 4, 1955. Ridgway (1904:557) listedT. b. eremophilusfrom Saltillo in April and as breeding at Sabinas.
The sizes of the testes (8 mm.; 6×4 mm.) of Nos. 32088 and 31660, respectively, suggest breeding 2 mi. W Jiménez and Sierra Guadalupe.
**Thryomanes bewickii cryptusOberholser.—Miller, Friedmann, Griscom, and Moore (1957:161) recordedT. b. cryptusfrom Saltillo.
*Thryothorus ludovicianus berlandieriBaird.—Specimens examined:total 3: ♂ 32086 from 12 mi. N, 12 mi. W Jiménez, 850 ft., June 19, 1952; sex ? 32087 from 2 mi. W Jiménez, June 20, 1952; and ♀ 31063 from 8 mi. N, 4 mi. W Múzquiz, 1800 ft., April 1, 1952, weight, 18.3 gms.
One subspecies of the Carolina Wren,berlandieri, occurs in Coahuila in the northeastern section of the State. Ridgway (1904:547) recordedT. l. berlandierifrom Sabinas. The fact that No. 32086 was a juvenile suggests that the Carolina Wren breeds 12 mi. N and 12 mi. W Jiménez.
*Campylorhynchus brunneicapillum couesiSharpe.—Specimens examined:total 6: ♂ 29429 from Cañon del Cochino (=16 mi. N, 21 mi. E Piedra Blanca), 3200 ft., April 6, 1950; ♂ 31064 from 7 mi. S, 2 mi. E Boquillas, 800 ft., February 29, 1952, weight, 38.1 gms.; ♀ 31066 (skeleton only) from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 5, 1952; ♂ 31637 from La Gacha (=La Concha), December 1, 1953, weight, 40 gms.; ♂ 31638 from 18 mi. S Ocampo, December 16, 1953; and sex ? 29557 from 7 mi. S, 1 mi. E Gómez Farías, 6500 ft., November 18, 1949, weight, 41 gms.
This subspecies of the Cactus Wren occurs throughout Coahuila except in the extreme southeastern section of the State, where the subspeciesC. b. guttatusoccurs. Miller (1955a:169) foundC. b. couesibreeding and occupying the open swales and mesas at the base of the mountains of the Sierra del Carmen. Burleigh and Lowery (1942:198) foundC. brunneicapillum"to be rather scarce and decidedly local in its distribution" and observed an occasional bird "in the open desert country west of Saltillo." Miller, Friedmann, Griscom, and Moore (1957:151) recordedC. b. couesi"south to [the] vicinity of Monclova."
No. 29557 does not have any characters ofC. b. guttatus; its under tail coverts and flanks have roundish black spots, rather than black bars as inC. b. guttatus.
**Campylorhynchus brunneicapillum guttatus(Gould).—This subspecies of Cactus Wren seems to occupy the extreme southeastern section of Coahuila. Miller, Friedmann, Griscom, and Moore (1957:152) recordedC. b. guttatusfrom Hipólito.
Telmatodytes palustris plesius(Oberholser).—Miller, Friedmann, Griscom, and Moore (1957:148) reported this subspecies of the Long-billed Marsh Wren from 8 mi. S Cuatro Ciénegas.
*Catherpes mexicanus albifrons(Giraud).—Miller (1955a:170) found this subspecies of Cañon Wren "in shaded rocky canyons and on larger cliff slopes at the base of the mountains from 4700 to 5300 feet" in the Sierra del Carmen where it nested. Burleigh and Lowery (1942:198) noted that the Cañon Wren was "decidedly uncommon" at Saltillo and obtained a male at the Chorro de Agua on April 19. Ridgway (1904:657) listedC. m. albifronsfrom Patos.
*Salpinctes obsoletus obsoletus(Say).—Specimens examined:total 4: ♀ 31067 from 1 mi. N Boquillas, 700 ft., March 6, 1952, weight, 16.1 gms.; ♀ 31068 from 7 mi. S, 2 mi. E Boquillas, 800 ft., March 1, 1952, weight, 18.2 gms.; sex ? 29558 from 12 mi. N, 10 mi. E Parras, 5000 ft., November 11, 1949, weight, 16.9 gms.; and ♂ 32089 from 7 mi. S, 4 mi. E Bella Unión 7200 ft., June 24, 1952.
The Rock Wren is common in Coahuila. Miller (1955a:170) foundS. o. obsoletus"only in the rocky piedmont and on lower bare canyon faces" and stated that Marsh took a bird in fresh fall plumage on September 6 at El Jardín. Sutton and Burleigh (1939a:37) found the Rock Wren "near San Pedro." Burleigh and Lowery (1942:198) wrote that the subspeciesobsoletuswas "characteristically a bird of the arroyos of the arid plateau about Saltillo, where it was fairly common...." The large size of the testes (5×3 mm.) of No. 32089 and the date (June 24) on which it was obtained suggest breeding by the Rock Wren 7 mi. S and 4 mi. E Bella Unión.
*Mimus polyglottos leucopterus(Vigors).—Specimens examined:total 5: ♀ 31070 from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 5, 1952, weight, 55.1 gms.; ♂ ♂ 32094-32095 from 2 mi. W Jiménez, 850 ft., June 20, 1952; ♂ 32096 from 5 mi. N, 19 mi. W Cuatro Ciénegas, 3250 ft., July 5, 1952; and ♂ 33186 (skeleton only) from Parras, July 5, 1955, testes, 6×3 mm.
The Mockingbird is sparsely distributed throughout Coahuila. Miller (1955a:170) foundM. p. leucopterusin the mesquite and catclaw at the base of the mountains in the Sierra del Carmen. Sutton and Burleigh (1939a:37) reportedM. p. leucopterusfrom Diamante Pass. Amadon and Phillips (1947:578) found a young Mockingbird out of the nest begging for food from an adult on August 18 at Las Delicias. Burleigh and Lowery (1942:199) found the Mockingbird on the arid plateau "about Saltillo." Hellmayr (1934:308) listedM. p. leucopterusfrom Jaral. Findley saw Mockingbirds 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952. Dickerman saw Mockingbirds in the Sierra del Pino on May 12, 1954, and 8 mi. E and 2 mi. S Americanos on May 18, 1954. The sizes of the testes (8, 7 mm.) of Nos. 32094 and 32096, respectively, suggest breeding 2 mi. W Jiménez and 5 mi. N and 19 mi. W Cuatro Ciénegas, as does No. 32095, a juvenile.
*Toxostoma longirostre sennetti(Ridgway).—Specimen examined:one, ♂ 32090, from 2 mi. S, 3 mi. E San Juan de Sabinas, June 22, 1952.
In Coahuila the Long-billed Thrasher seems to be uncommon. It has been recorded in Coahuila as far west as San Juan de Sabinas. Ridgway (1907:192) recordedT. l. sennettifrom Sabinas, the only other record of the Long-billed Thrasher, to my knowledge, from the State. The large size of the testes (11×6 mm.) of No. 32090 and the date (June 22) on which it was obtained suggest thatT. l. sennettibreeds 2 mi. S and 3 mi. E San Juan de Sabinas.
*Toxostoma curvirostre celsumMoore.—Specimens examined:total 2: ♀ 31071 from 7 mi. S, 2 mi. E Boquillas, March 1, 1952, wing, 111 mm., tail, 114 mm., weight, 97.2 gms.; and ♀ 31072 (skeleton only) from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 5, 1952.
This subspecies of the Curve-billed Thrasher occurs in northwestern Coahuila. Specimens ofT. c. celsumandoberholserifrom Coahuila are too few to show clearly the distribution and intergradation in Coahuila.
No. 31071 is referred toT. c. celsumbecause of large size; the spots on its upper abdomen, which are large and pronounced, suggest a relationship withT. c. oberholseri. Miller (1955a:170) remarked thatT. c. celsumwas a scarce resident of the desert scrub at the mouth of Boquillas Canyon of the Sierra del Carmen.
*Toxostoma curvirostre oberholseriLaw.—Specimens examined:total 5: ♀ 35405 (skeleton only) from 4 mi. N San Isidro, May 11, 1954; ♀ 32091 from 5 mi. N, 19 mi. W Cuatro Ciénegas, 3250 ft., July 5, 1952; ♂ 32833 from Parras, July 4, 1955, weight, 76.5 gms.; ♀ 32092 from 7 mi. S, 4 mi. E Bella Unión, 7200 ft., June 25, 1952; and ♂ 31614 from 16 mi. W San Antonio de las Alazanas, 6500 ft., January 7, 1954, weight, 90 gms.
This subspecies of the Curve-billed Thrasher occurs in eastern and southern Coahuila. Amadon and Phillips (1947:578) took a Curve-billed Thrasher twenty miles west of Saltillo that had an enlarged ovary and a brood patch still somewhat evident on August 27. Burleigh and Lowery (1942:199) stated thatT. c. oberholseri"was rather widely and commonly distributed, being noted from the area about the summit of Diamante Pass at 7,800 feet down to the desert country about Saltillo." Miller, Friedmann, Griscom, and Moore (1957:177) recordedT. c. oberholserifrom Sabinas, from 8 mi. S Cuatro Ciénegas, and from El Diamante. Hellmayr (1934:298) also recordedT. c. oberholserifrom Sabinas, as did Ridgway (1907:199) under the nameT. c. curvirostrebefore the subspeciesoberholseriwas named. The female from 4 mi. N San Isidro had an egg in its oviduct. The immature male (32833), the large size of ovum (8 mm.) of No. 32092, and the presence of a brood patch on No. 32091 also are evidences of breeding by the Curve-billed Thrasher in Coahuila.
*Toxostoma dorsale dorsaleHenry.—The Crissal Thrasher is uncommon in Coahuila. The subspeciesdorsaleoccurs in northern Coahuila. Miller (1955a:170-171) found the subspeciesdorsale, at about 4700 feet, only in the mesquite, desert willow, and walnut scrub along the wash of Boquillas Canyon of the Sierra del Carmen and remarked also that the bird nested there.