The Olive Sparrow is uncommon in Coahuila. Miller, Friedmann, Griscom, and Moore (1957:349) listed _A. r. rufivirgata_ from Sabinas on February 10. Sabinas and southeast of San Juan de Sabinas seem to be the only localities in Coahuila where the Olive Sparrow has been collected and also are at the westernmost extremity of range of this species. The size of the testes (9x7 mm.) of No. 32152 and the dates of collection indicate breeding by the Olive Sparrow in Coahuila. _Chlorura chlorura_ (Audubon).--_Specimen examined:_ one, [Male] 30238, from 1 mi. N San Lorenzo, 4200 ft., February 5, 1951. The Green-tailed Towhee is a common migrant and winter visitant in Coahuila; the species has been found at several localities. Miller (1955a:175) noted several migrants "each day in the last week of April ... at the mouth of Boquillas Canyon" of the Sierra del Carmen. Burleigh and Lowery (1942:207) noted the species "in an arroyo in the open desert country about twenty miles west of Saltillo on April 22." Miller, Friedmann, Griscom, and Moore (1957:351) listed the Green-tailed Towhee from 12 mi. W Saltillo on September 28 and from Sabinas. *_Piplio erythrophthalmus gaigei_ Van Tyne and Sutton.--_Specimens examined:_ total 3: [Female] 31102 from Fortin (=33 mi. N, 8 mi. W San Geronimo), 3300 ft., March 28, 1952, weight, 38.8 gms.; [Male] 35412 (skeleton only) from Sierra del Pino (=5 mi. W, 3 mi. S Acebuches), 6200 ft., May 15, 1954, testes enlarged, weight, 34 gms.; and [Male] 31593 from 17 mi. S Ocampo, 5300 ft., April 7, 1954, weight, 38 gms. The Rufous-sided Towhee is locally common in Coahuila; _P. e. gaigei_ is present in northern Coahuila. Miller (1955a:175) remarked that "between 6800 and 7500 feet these towhees were sparsely distributed in areas of scattered low ceanothus and hawthorne, chiefly in canyon bottoms, but also on slopes where ceanothus was intermingled with downed timber and young pines." He (_loc. cit._) indicated that the adult obtained by Marsh from Vivoras Canyon on August 25 was _P. e. gaigei_ rather than _P. maculatus montanus_ (see also Sibley, 1950:127). Dickerman saw Rufous-sided Towhees in the Sierra de la Madera on December 13, 1953. I have referred Nos. 31102 and 31593 to _gaigei_ although both are close to _orientalis_. The size of the testes (14x8 mm.) of No. 31593 suggests breeding. *_Piplio erythrophthalmus orientalis_ Sibley.--_Specimens examined:_ total 3: [Male] 32154 from 7 mi. S, 4 mi. E Bella Union, 7200 ft., June 25, 1952; [Male] 33223 (skeleton only) from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955; and [Male] 31630 from Mesa de Tablas, 8600 ft., January 15, 1954, weight, 46 gms.