*_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 Pass seems to represent the subspecies _arizonae_. Dickerman saw four Whip-poor-wills 20 mi. S Ocampo, 6000 feet, on April 4, 1954. The sizes of the testes of Nos. 31449, 31028, and 31029 (13, 12, and 13 mm. long) and an egg taken from No. 31450 indicate breeding by this species in the State.
*_Phalaenoptilus nuttallii nuttallii_ (Audubon).--_Specimens examined:_ total 6: [Male] 31032 from 37 mi. S, 21 mi. E Boquillas, 4100 ft., March 12, 1952; [Male] 31446 and [Female] 31447 from Sierra del Pino (=5 mi. S, 3 mi. W Acebuches), 6200 ft., May 13, 1954; [Male] [Male] 32048-32049 from 2 mi. S, 11 mi. E Nava, June 16, 1952; and [Female] 31033 from 4 mi. W Hacienda La Mariposa, 2300 ft., March 26, 1952.
Miller (1955a:164) found the Poor-will common along the rocky canyon walls up to 5000 feet in the Sierra del Carmen. Ridgway (1914:550) recorded the Poor-will at Sabinas on May 21 and at Saltillo on May 6. Van Tyne and Sutton (1937:39) stated that _P. n. nuttallii_ was not common in the Big Bend Country of Texas; this probably is true for northwestern Coahuila as well. The specimens from the Sierra del Pino, collected by Dickerman in a pine-oak association at 6200 feet, were taken near the upper limit of their range. Findley saw Poor-wills 2 mi. W Jiménez, 850 feet, on June 19, 1952; 2 mi. S and 11 mi. E Nava, 810 feet, on June 15, 1952; and 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952. Dickerman noted Poor-wills 16 mi. E and 18 mi. N Ocampo on May 7, 1954, and 20 mi. S Ocampo, 6000 feet, on April 4, 1954.