﻿ANTROZOUS PALLIDUS. 



43 



ANTROZOUS PALLIDUS (Le Coute). Pale Bat. 



1856. Vespertilio x)aUidm Le Conte, Proc. Acad. Nat. Sci. Phila., VII (1854-1855) p. 437, 



1862. Antrozous pallidus H. Allen, Proc. Acad. Nat. Sci. Phila., p. 247. 



1864. Antrozous pallidus H. Allen, Monogr. N. Am. Bats, p. 68 (part). 



1878. Antrozoua ])allidus Dobson, Catal. Chiroptera Brit. Mus., p. 171 (part). 



1893. Antrozous pallidus H. Allen, Monogr. Bats N. Am., p. 66 (part). 



Type locality. — El Paso, Texas. (Type No. 5407, U. S. National 

 Museum.) 



Geographic distribution.— howe^v Austral zone tlirougiiout tlie desert 

 region of eastern California, Nevada, Arizona, New Mexico, and western 

 Texas. 



General characters. — Size large (average length of forearm about 50 

 mm.) ; ears large, reaching 20 mm. beyond tip of nose when laid forward ; 

 coh)r very pale drab -gray. 



Ears. — The ears (PI. I, fig. 10) are larger than in any other North 

 American Vespertilionidw except the species of 

 PJeeotincc. Laid forward they extend about 20 mm. 

 beyond the tip of the nose. Tlie anterior bases are 

 rather close together, but separate. In form the 

 ear is so simx)le as to call for no very detailed 

 description. Anterior border strongly convex im- 

 mediately above well-marked anterior lobe, then 

 almost straight to narrowly rouuded-oft' tip. Pos- 

 terior border slightly concave immediately below 

 tip, then gently convex to base. Posterior basal 

 lobe very slightly developed. A transverse ridge 

 4 mm. in length extends obli(iuely upward and for- 

 ward from near posterior base of tragus. 



Tragus long, straight, and slender. Anterior 

 border nearly straight to narrow tip. Posterior 

 border at first almost parallel with anterior bor- 

 der, then slightly convex to notch above well-developed basal lobe. 

 Whole posterior margin of tragus faintly crenulate. 



Memhranes. — The membranes are thick and leathery, much more so 

 than in any of the North Amo^vicimYGspertUioninw which ax)proach this 

 species in size. Wing membranes attached at base of toes ; interfemoral 

 membrane at base of terminal caudal vertebra. Free border of inter- 

 femoral membrane considerably longer than calcar. 



Feet. — The feet are broad and strong, about half as long as tibia. 

 Toes armed with large claws aiul sprinkled with a few short hairs on 

 dorsum of i)halanges. 



Fur and color. — The fur is sparse and short, that on middle of back 

 only about 8 mm. in length. It is closely confined to the body, and 

 extends on ears and membranes in a narrow border along extreme 

 base only. 



Fia. 4. — Alniorriial front 

 t ( ■ I' t h ( ) f y1 ; / trozo ns pal- 

 lidus^ sliowiiii!; tlirre 

 iucisoi's oil riiilit side. 

 No. G0119 from Silver 

 City, ]Sr.]\[ox. ( - 10). 



