The Verdin occurs up to about 5000 feet in Coahuila. Miller (1955a:168)
reported that "this desert species followed the catclaw scrub up the
washes to about 4800 feet, the limit of such habitat" in the Sierra del
Carmen and also gave evidence of breeding by the Verdin in Coahuila.
Amadon and Phillips (1947:578) reported a nest of _Auriparus flaviceps_
at Las Delicias. Burleigh and Lowery (1942:197) obtained a single
specimen "in an arroyo a few miles east of Saltillo" and a single
specimen "about twenty miles west" of Saltillo. Ridgway (1904:421)
reported _A. f. ornatus_ [he referred to it as _A. f. flaviceps_] at
Monclova. Hellmayr (1934:88) listed _A. f. ornatus_ from Jaral. Findley
saw a Verdin 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952.
The size (wing, 50 mm.; tail, 43 mm.) of No. 31056 is small for typical
representatives of _A. f. ornatus_. The yellow of the head of No. 31056
is darker than that of the other subspecies of the Verdin, and I have
accordingly allocated the specimen to _A. f. ornatus_.
*_Psaltriparus melanotis lloydi_ Sennett.--_Specimens examined:_ total
5: [Male] 31058 and [Female] 31057 from 37 mi. S, 21 mi. E Boquillas,
4100 ft., March 13, 1952; [Male] 31060 and [Female] 31059 from Sierra
de la Encantada (=38 mi. S, 23 mi. E Boquillas), 4400 ft., March 15,
1952; and [Male] 35407 (skeleton only) from Sierra del Pino (=5 mi. W,
3 mi. S Acebuches), 6200 ft., May 14, 1954.
The Black-eared Bushtit is common in Coahuila. Typical representatives
of _P. m. lloydi_ in the northern part of the State range from 4100
feet to 8000 feet. Miller (1955a:168-169) reported _P. m. lloydi_
breeding in the Sierra del Carmen. Marsh and Stevenson (1938:287)
obtained a male in the Sierra del Carmen at El Jardin. The size of the
testes (3.5 mm.) of No. 31058 suggests breeding by the Black-eared
Bushtit 37 mi. S and 21 mi. E Boquillas.
**_Psaltriparus melanotis iulus_ Jouy.--_Specimens examined:_ total 2:
[Male] 31659 from the north slope of Sierra Guadalupe (=10 mi. S, 7 mi.
W General Cepeda), 7000 ft., April 20, 1953; and [Female] 31658 from
the north slope of Sierra Guadalupe (=10 mi. S, 5 mi. W General
Cepeda), 6700 ft., April 15, 1953.
Typical representatives of this Black-eared Bushtit are present in the
southeastern sector of Coahuila. The backs of Nos. 31658-31659 differ
slightly in color from the backs of typical representatives of
_lloydi_. I suspect that the specimens from the Sierra Guadalupe are
intergrades between _lloydi_ and _iulus_.
Burleigh and Lowery (1942:197) took two males and two females of
_Psaltriparus melanotis iulus_ (they called their specimens
_Psaltriparus minimus iulus_) at Saltillo and stated that their
specimens tended to approach _lloydi_ rather than being typical
_iulus_. Sutton and Burleigh (1939a:36) recorded _P. m. iulus_ only at
Diamante Pass where they took two specimens.
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