Miller (1955a:170) stated that _T. b. eremophilus_ was "common in the piedmont area on yucca-dotted slopes and along the lower canyon walls in growth of pinon, yucca, and cactus" in the Sierra del Carmen, and reported breeding there. Burleigh and Lowery (1942:198) remarked that _T. 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) noted _Thryomanes bewickii_ at San Pedro on January 29 and 30. Hardy saw a male _T. b. eremophilus_ at Parras on July 4, 1955. Ridgway (1904:557) listed _T. b. eremophilus_ from Saltillo in April and as breeding at Sabinas. The sizes of the testes (8 mm.; 6x4 mm.) of Nos. 32088 and 31660, respectively, suggest breeding 2 mi. W Jimenez and Sierra Guadalupe. **_Thryomanes bewickii cryptus_ Oberholser.--Miller, Friedmann, Griscom, and Moore (1957:161) recorded _T. b. cryptus_ from Saltillo. *_Thryothorus ludovicianus berlandieri_ Baird.--_Specimens examined:_ total 3: [Male] 32086 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 19, 1952; sex ? 32087 from 2 mi. W Jimenez, June 20, 1952; and [Female] 31063 from 8 mi. N, 4 mi. W Muzquiz, 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) recorded _T. l. berlandieri_ from Sabinas. The fact that No. 32086 was a juvenile suggests that the Carolina Wren breeds 12 mi. N and 12 mi. W Jimenez. *_Campylorhynchus brunneicapillum couesi_ Sharpe.--_Specimens examined:_ total 6: [Male] 29429 from Canyon del Cochino (=16 mi. N, 21 mi. E Piedra Blanca), 3200 ft., April 6, 1950; [Male] 31064 from 7 mi. S, 2 mi. E Boquillas, 800 ft., February 29, 1952, weight, 38.1 gms.; [Female] 31066 (skeleton only) from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 5, 1952; [Male] 31637 from La Gacha (=La Concha), December 1, 1953, weight, 40 gms.; [Male] 31638 from 18 mi. S Ocampo, December 16, 1953; and sex ? 29557 from 7 mi. S, 1 mi. E Gomez Farias, 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 subspecies _C. b. guttatus_ occurs. Miller (1955a:169) found _C. b. couesi_ breeding and occupying the open swales and mesas at the base of the mountains of the Sierra del Carmen. Burleigh and Lowery (1942:198) found _C. 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) recorded _C. b. couesi_ "south to [the] vicinity of Monclova."