from 20 mi. S Ocampo, 6500 ft., April 5, 1954, weight, 55
gms.

Concerning forms of Pygmy Owls, Miller (1955a:164) remarked that the
best distinguishing characters of _G. g. gnoma_ and _californicum_ are
tail length and wing length. The characters of No. 31582 (wing, 94 mm.;
tail, 69 mm.) are clearly those of _californicum_ and not those of
_gnoma_. Miller (_loc. cit._) remarked that he "encountered at least
five different individuals, chiefly in the pine-oak at 7000 feet" and
one in oaks and pinons at 5000 feet in Boquillas Canyon of the Sierra
del Carmen. The size of the testes (left, 9x5 mm.; right, 7x4 mm.) of
No. 31582 indicates good probability of breeding by the Pygmy Owl in
the State.

**_Micrathene whitneyi_ (Cooper).--Miller (1955a:164) heard the Elf Owl
at close range in oaks at 5000 feet in Boquillas Canyon of the Sierra
del Carmen on April 24.

**_Speotyto cunicularia hypugaea_ (Bonaparte).--_Specimens examined:_
total 3: [Female] 32043 from 3 mi. S, 9 mi. E Cuatro Cienegas, 2250
ft., June 30, 1952; [Male] 32653 from 6 mi. W San Antonio de las
Alazanas, July 5, 1955; and [Male] 31602 from 14 mi. W San Antonio de
las Alazanas, 6500 ft., January 7, 1954.

Although there are no records in Coahuila of specimens of Burrowing
Owls north of 3 mi. S and 9 mi. E Cuatro Cienegas, this owl probably
occurs in the northern section of the State. The records of Burrowing
Owls from the southern part of Brewster County, Texas (Van Tyne and
Sutton, 1937:38), suggest such occurrence. No. 31602 was shot in a
prairie dog colony; No. 32043 was captured in a steel trap. Baker saw
Burrowing Owls 7 mi. S and 4 mi. E Bella Union, 7200 feet, on June 25,
1952.

*_Caprimulgus vociferus arizonae_ (Brewster).--_Specimens examined:_
total 4: [Male] 31449 and [Female] 31450 from Sierra del Pino (=5 mi.
S, 3 mi. W Acebuches), May 12 and 15, 1954, weights, 48 and 42 gms.;
and [Male] [Male] 31028-31029 from 2 mi. N, 18 mi. W Santa Teresa, 7250
ft., April 3, 1952.

The Whip-poor-will occurs between 5000 feet and 9000 feet in Coahuila.
Miller (1955a:164) reported _C. v. arizonae_ in the Sierra del Carmen.
Ridgway (1914:521) stated that _Antrostomus vociferus macromystax_
(=_C. v. arizonae_) occurs in the southeastern sector of Coahuila at
Sierra Guadalupe. Burleigh and Lowery (1942:190) reported the
Whip-poor-will "near the summit of Diamante Pass"; because of its size
(wing, 170 mm.; tail, 135 mm.) this Whip-poor-will from Diamante Pas