Nos. 32148-32151 and 32940 were typical for the subspecies _psaltria_. A partial albino (32939), which was obtained from a pine-oak-wheat field edge, has upper parts that lack the black coloring of typical representatives of _S. p. psaltria_. Instead the crown and back of No. 32939 is yellow, resembling the color of its underparts, the wing coverts are white, and its primaries are black with white edgings.
*_Atlapetes pileatus dilutus_ Ridgway.--_Specimens examined:_ total 2: [Male] 32942 and [Female] 32943 from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955.
The Rufous-capped Atlapetes occurs uncommonly in southeastern Coahuila. The male and female _A. p. dilutus_ from 13 mi. E San Antonio de las Alazanas represent the first records of occurrence of this subspecies in the State. The smaller size, grayer upper parts, and pale yellow color of the underparts of Nos. 32942-32943 characterize the subspecies _dilutus_. The size of the testes (7×6 mm.) of No. 32942 and the date (July 6) on which both specimens were collected indicate breeding by this species in Coahuila.
*_Arremonops rufivirgata rufivirgata_ (Lawrence).--_Specimens examined:_ total 2: [Male] 32152 and [Female] 32153 from 2 mi. S, 3 mi. E San Juan de Sabinas, June 22 and 23, 1952.
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 (9×7 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.