Sutton and Burleigh (1939a:36) reported taking specimens of _P. s. eidos_ at 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 (6x5 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 sclateri_ Kleinschmidt.--Miller, Friedmann, Griscom, and Moore (1957:133) stated that a specimen (or specimens?) of _P. s. sclateri_ which showed evidence of intergradation with _P. s. eidos_ was obtained at El Diamante. **_Parus atricristatus dysleptus_ Van Tyne.--_Specimen examined:_ one, [Male] 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. dysleptus_ occurs in northwestern Coahuila. Miller (1955a:168) stated that the Black-crested Titmouse, identified as _dysleptus_, was the only representative of the genus _Parus_ in the Sierra del Carmen. The weak extension of black onto the nape in No. 31054 suggests intergradation between _P. a. dysleptus_ and _P. a. atricristatus_; the latter lacks the black nape of _dysleptus_. *_Parus atricristatus atricristatus_ Cassin.--_Specimens examined:_ total 4: [Female] 32084 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 19, 1952; sex ? 32085 from 2 mi. W Jimenez, 850 ft., June 20, 1952; [Female] 31055 (skeleton only) from Fortin (=33 mi. N, 1 mi. E San Geronimo), 3300 ft., on March 29, 1952; and [Female] 35399 (skeleton only) from 3.5 mi. W, 22 mi. S Ocampo, December 15, 1953, weight, 16 gms. Typical _P. a. atricristatus_ occurs in Coahuila in the southeastern sector (Dixon, 1955:184). Black-crested Titmice intermediate between _atricristatus_ and _dysleptus_ were listed from Cuidad Muzquiz and Sabinas by Dixon (_loc. cit._:189), as _dysleptus_ but were shown on his map (_loc. cit._:184) as _atricristatus_. Our Nos. 32084 and 32085 (wing, 71, 71, tail, 63, 64 mm.) are small and fall in the upper range of size for _atricristatus_ to which the specimens are here referred. *_Auriparus flaviceps ornatus_ (Lawrence).--_Specimen examined:_ one, [Male] 31056, from Sierra de la Encantada (=38 mi. S, 23 mi. E Boquillas), 4400 ft., March 15, 1952.