n the San Pedro
district on January 29 and 30. Miller, Friedmann, Griscom, and Moore
(1957:330) recorded breeding by _P. s. sinuata_ at Hipolito on July 2.
The size of the testes (8 mm.) of No. 32137 indicates breeding in
central Coahuila.

*_Pheucticus melanocephalus melanocephalus_ (Swainson).--_Specimen
examined:_ one, [Male] 31664, from Sierra Guadalupe (=10 mi. S, 5 mi. W
General Cepeda), 7500 ft., April 30, 1953, measurements: wing, 105.5
mm.; tail, 78 mm.; culmen, 19 mm.; weight, 48 gms.

Miller (1955a:174) reported that the Black-headed Grosbeak first
appeared in the Sierra del Carmen on April 13 and was soon seen
patrolling territories. He remarked that these specimens from the
Sierra del Carmen conformed adequately with the rather poorly
differentiated race _P. m. melanocephalus_ and stated that Marsh took
an immature male at Jardin del Sur on September 7. Oberholser
(1919b:416) listed _Hedymeles melanocephalus papago_ (=_P. m.
melanocephalus_) from Sierra Guadalupe on April 27. Dickerman saw
Black-headed Grosbeaks in the Sierra del Pino on May 12, 1954, and 16
mi. E and 18 mi. N Ocampo on May 7, 1954. The size of No. 31664
represents the characters of _P. m. melanocephalus_ as presented by
Oberholser (1919b:413). No specimen of _P. m. melanocephalus_ from
Coahuila, to my knowledge, approaches _P. m. maculatus_. The size of
the testes (7x5 mm.) of No. 31664 suggests breeding by this subspecies
in the Sierra Guadalupe.

*_Guiraca caerulea interfusa_ Dwight and Griscom.--_Specimens
examined:_ total 2: [Male] 32138 from 12 mi. N, 12 mi. W Jimenez, 850
ft., June 18, 1952; and [Female] 32139 from 2 mi. W Jimenez, 850 ft.,
June 21, 1952.

Burleigh and Lowery (1942:206) recorded this Blue Grosbeak from "about
twenty miles west of Saltillo" on April 22. Miller (1955a:174) stated
that Marsh obtained a male _G. c. interfusa_ at Vivoras Spring on
August 3. Miller, Friedmann, Griscom, and Moore (1957:334) remarked
that the Blue Grosbeak breeds in the northern and eastern sections and
reported _G. c. interfusa_ from Hipolito on July 2. Amadon and Phillips
(1947:580) reported examining material from Sabinas referable to _G. c.
interfusa_. Dickerman saw Blue Grosbeaks 4 mi. N San Isidro on May 10,
1954. Findley saw Blue Grosbeaks 4 mi. W Jimenez on June 19, 1952, and
2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952. Nos.
32138-32139 are typical representatives of _G. c. interfusa_. The size
of the testes (12 mm