LASIURUS. It 



a small wart wliich is covered with setts. The tragus is half the 

 heig'lit of the ear, is straight on the inner edge, except at the 

 point, where it turns abruptly inwards. The outer border has a 

 very irregular outline. The basal portion is iudentated. This 

 indentation, which, in comparison to other species of Vesjyer- 

 tUionidae is considerable, is of itself not very deep, and ends in 

 the most convex point of the tragus, whence the border runs 

 upward and inward to the tip. The lower jaw is covered with 

 short hairs, and has at its symphysis a small naked space which 

 is gradually lost along the sides of the mouth. The posterior 

 surface of the ear is covered with hair one-half its length, which 

 extends upon the anterior production of the external border 

 down to the angle of the mouth. 



The fur of the body is everywhere long and silky. Anteriorly 

 it is rather denser though not quite so long as that posteriorly. 

 It is of a light russet red, tinged with yellow — being tipped with 

 gray toward the neck, and verging to a fawn color, in some speci- 

 mens, towards the pubis. 'Fur of the same general hue extends 

 from the body upon the alar membranes up to the base of the 

 third linger of either side and blends with that upon the anterior 

 surface of the intcrfemoral membrane at about the region of the 

 tibio-femoral articulation. The hair upon the latter membrane 

 runs down fully one-half its length in most specimens. The inter- 

 brachial expansion also possesses a sparse growth of yellowish 

 fur. Posteriorly the fur is very long and presents a richer appear- 

 ance than anteriorly. The russet red color is here predomi- 

 nant in the majority of individuals, though we meet with a great 

 variety of hues of fawn, f\xwn-red, and yellowish cinereous. At 

 each shoulder a conspicuous white tuft of hair is seen ; this is 

 not elevated above the surrounding fur of the neck with which 

 its whitish color gradually blends. 



The posterior surface of the alar membranes is less extensively 

 furred along the brachial and digital regions than the anterior 

 surface, being here almost altogether confined to longitudinal 

 bands extending from the neck downwards across the interbrachial 

 membrane midway from the shoulder to the elbow, and thence 

 continuing along the sides of the body and external border of the 

 tibia to the ankle and tarsus of either side. The dorsum of the 

 fifth finger, for about one-third of its length, is covered with fine 

 scattering hair, which in some individuals is not confined thereto 

 2"^ 



