﻿PIPISTRELLUS SUBFLAVUS. 



91 



1878. Vesperxgo geort/uDiKs Dol)son, Catal. Chiroptera Brit. Mns., p. 235. 

 1893. VcsperiK/o cayolineiisis H. Alleu, Moiiogr. Bats N. Am., p. 121 (not Vespertilio 

 caroUnensis Geoff.). 



Type locality. — Eastern United States; probably Georgia. 



GeograpMc distrihution. — Austral zones and casually parts of Transi- 

 tion zone in tbe Eastern United States, from the Atlantic Coast west to 

 Iowa and eastern and soutbern Texas. 



General characters. — Size small (forearm, abont 34); tbnmb long 

 (sibout i forearm) ; ear wben laid forward reacbing sligbtly beyond nos- 

 tril; tragus straight, tapering to a broadly rounded tip; feet small, 

 slightly more than half as long as tibia; terminal 2mm. of tail free 

 from membrane; hairs on back mostly distinctly tricolored; general 

 color light yellowish brown, undulated with darker brown. 



Ears. — The ears (fig. 20 a) are considerably longer than in P. Jiesperus, 

 reaching, when laid forward, just beyond nostril. In general form the 

 ear is much as in P. liesperiis^ but the auricle is slightly narrower, and 

 the basal lobe is smaller and separated from auricle by a slight notch 

 only. On dorsal surface of ear the fur of head extends scarcely to basal 

 third. Otherwise the ear is naked except for a sprinkling of fine hairs 

 on inner surface. 



Tragus about half length of ear, broadest opposite anterior base and 

 thence tapering gradually upward to bluntly rounded tip which is 

 turned slightly backward. Anterior border slightly concave at base, 

 then gently convex to tip. Posterior border slightly concave imme- 

 diately below tip, then strongly convex almost to notch above well 

 "developed basal lobe. 



Membranes. — The membranes are thin and delicate. Uropatagium 

 thinly furred on basal fourth, otherwise naked except for a few scat- 

 tered hairs along veins on lower side. Wing membranes attached at 

 base of toes. Uropatagium attached at base of terminal caudal 

 vertebra. 



Feet. — Foot large, distinctly more than half as long as tibia, covered 

 with conspicuous light-brown hairs on dorsal surface. Oalcar dis- 

 tinctly longer than tibia, scarcely keeled on j^osterior edge, terminal 

 lobe absent or very indistinct. 



Fur and color. — The fur extends on base of ears and interfemoral 

 membrane and on wing niembranes to line joining knee and middle of 

 forearm. 



Color light yellowish brown, uniform on the ventral surface, but on 

 the back clouded to a varying degree with darker brown. The hairs 

 on the back appear to be of two kinds. The main body of the fur is 

 made up of short hairs (about 0 mm. in length), which are deep plum- 

 beus from base to a little below middle, then yellowish brown almost 

 to extreme tip, which is dark brown. Intermixed with these shorter 

 hairs are others which are much longer (about 10 mm. in length) and 

 clear yellowish brown to extreme tip. 



