Range.—Southern New Mexico, western Texas and probably the adjoining parts of Mexico. Marginal occurrences (after Hatfield [op. cit.:261] except as otherwise indicated) are: New Mexico: Animas Valley; Florida Mountains; Carlsbad Cave. Texas: Mouth of Pecos River (Bailey, N. Amer. Fauna, 25:210, 1905); Boquillas (Borell and Bryant, Univ. California Publ. Zool., 48:9, 1942); Glen Spring (Borell and Bryant, loc. cit.).
Diagnosis.—Size large for the species; total length, 80.3(78-83); tibia, 12.3(11.7-13.1); forearm, 32.9(31.8-33.3); greatest length of skull, 12.7(12.3-12.9); breadth of braincase, 6.6(6.5-6.7). Color between Smoke Gray and Pale Drab (after Hatfield, op. cit.:261).
Pipistrellus hesperus santarosae Hatfield
Pipistrellus hesperus santarosae Hatfield, Jour. Mamm., 17:261, August 14, 1936.
Type locality.—Santa Rosa, Guadalupe County, New Mexico.
Range.—New Mexico (excepting southern part) and western Colorado. Marginal occurrences (after Hatfield, op. cit.:262) are: Colorado: Bedrock. New Mexico: Santa Rosa; Socorro; Laguna.
Diagnosis.—Size large for the species; total length, 82.0(80-86); tibia, 12.4(11.9-13.0); forearm, 32.8(31.7-34.1); greatest length of skull, 12.7(12.3-13.1); breadth of braincase, 6.6(6.3-6.8). Color between Buffy Brown and Wood Brown (after Hatfield, op. cit.:261, 262).
Pipistrellus subflavus
(Synonomy under subspecies)