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 subspecies _crinitus_ has an "enormous swollen bill" (exposed culmen of male, 20 mm.; breadth of bill at middle of nostril, 10.3 mm.) whereas _M. c. boreus_ has 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 of _M. c. crinitus_ or _boreus_. Nevertheless, I suspect that Nos. 32065 and 32067 represent _crinitus_ (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 cooperi_ Baird.--_Specimens examined:_ total 2: [Male] 32068 and [Female] 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 of _M. t. cooperi_. Measurements of our specimens agree well with the average measurements of typical _M. t. cooperi_. According to Ridgway (1907:621), _M. t. cooperi_ (then called _Myiarchus mexicanus mexicanus_) has been recorded from Sabinas. The size of the testes (14x7 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: [Female] 31045 from 15 mi. SE Boquillas, 1500 ft., March 16, 1952; [Male] 32070 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 19, 1952; [Female] 32071 from 2 mi. W Jimenez, 850 ft., June 20, 1952; [Male] 35413 from 6 mi. N, 2 mi. W Castillon, 3750 ft., June 30, 1953; [Male] 32072 from 9 mi. S, 11 mi. E Sabinas, June 14, 1952; [Female] 31584 from 17 mi. S Ocampo, 5300 ft., April 7, 1954; and [Male] 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 of _M. c. cinerascens_. Ridgway (1907:626) listed _M. c. cinerascens_ from 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) recorded _M. c. cinerascens_ from "near Saltillo." Dickerman obtained No. 31584 in a mesquite-grassland-shrubby area. Miller, Friedmann, Griscom, and Moore (1957:78) stated that _M. c. cinerascens_ breeds in Coahuila.