.) of No. 32138, the size of the largest ovum (2
mm.) of No. 32139, and the dates (June 18, 21) on which they were
collected are evidence of breeding by this subspecies.

**_Guiraca caerulea eurhyncha_ Coues.--Amadon and Phillips (1947:580)
obtained an adult male of this Blue Grosbeak from Las Delicias on
August 12. This subspecies, according to Miller, Friedmann, Griscom,
and Moore (1957:334), is resident at middle and lower elevations
through most of central and southern Mexico. Except for the occurrence
of intergrades of _G. c. interfusa_, _caerulea_, and _eurhyncha_ in
southern Nuevo Leon and Tamaulipas (Miller, Friedmann, Griscom, and
Moore, 1957:335), the record from Las Delicias represents the northern
limit of the range of the subspecies _eurhyncha_.

*_Passerina cyanea_ (Linnaeus).--_Specimen examined:_ one, [Male]
31544, from San Marcos, May 5, 1954.

The Indigo Bunting is rare in Coahuila. Van Hoose (1955:303) reported
that No. 31544 seems to provide the first record of the species in the
State. The Indigo Bunting is a summer resident in southwestern Oklahoma
and southeastern Texas (Miller, Friedmann, Griscom, and Moore,
1957:336). No. 31544 seemingly represents a large extension in the
summer range of the Indigo Bunting. Van Hoose (_loc. cit._) stated that
No. 31544 was observed chasing another male, and the pursuer in turn
was followed by a female; he thought that the territorial behavior of
this bird suggested breeding.

*_Passerina versicolor versicolor_ (Bonaparte).--_Specimens examined:_
total 2: [Male] 35414 from 6 mi. N, 2 mi. W Castillon, 3750 ft., June
30, 1953, weight, 8 gms.; and [Male] 35415 from 5 mi. S Castillon, 4150
ft., June 28, 1953.

Although the Varied Bunting has been recorded only from northwestern
Coahuila, I suspect that this bird is locally common throughout most of
the State. Miller (1955a:174) stated that the habitat of this species
consisted of catclaw-covered bottom lands at the base of the Sierra del
Carmen at 4700 feet. Miller's records indicate incipient breeding by
_P. v. versicolor_ in the Sierra del Carmen on April 26. The size of
the testes (11 mm.) of No. 35415 and the dates (June 28, 30) on which
Nos. 35414-35415 were collected are strong evidence of breeding by the
Varied Bunting 6 mi. N and 2 mi. W Castillon and 5 mi. S Castillon.

*_Passerina ciris pallidior_ Mearns.--_Specimens examined:_ total 6:
[Male] 32141 and [Female] 32142 from 2 mi. S, 11 mi. E Nava, 810