138 BULLETIN 43, UNITED STATES NATIONAL MUSEUM. 



The tip of the tail is free. In specimen 6098, Museum of Comparative 

 Zoology, tlie mammary glands were large. The two nipples were near 

 each other toward the axilla, without a furred surface intervening. 



Han^ everywhere long and silky. Dorsum, including the head, neck 

 and ears, with hair at the basal half dark brown; apical half old -old 

 On the membrane from the proximal third of the arm to the knee the 

 hair IS the same as on the body. It is longer than the hair in similar 

 positions in the red bat or the hoary bat. A light-brown tuft overlies 

 the first metacarpal bone, and the prebrachium above the elbow. 

 TInicolored light-brown hair sparsely covers the interfemoral membrane 

 as far as a line that unites the ankles. The fleshy extension to the 

 outer side of the calcaneum as in AtaJapha. Ventre including the sub- 

 mental region and the neck, with basal two-thirds dark brown, apical 

 third light brown 5 no shades of old gold are present. A sparse growth 

 of light-brown, unicolored hair extends along the forearm its entire 

 length and upon the metacarpus as far as the third digit The end 

 opatagium from the elbows to the knee is covered with hair having the 

 same characters as the above. 



No differentiations are seen on the side of the neck or of ])ody. The 

 ears are covered at the basal two-tliirds.* 



Memhrcmes.—Thfi markings on the wing membranes are so similar to 

 those of .4. cinerea that tliey need not be described. The propatagium 

 is not withdrawn behind the ulna at any point. 



YariaUons.—An example from Davenport, Fla., in the collection of 

 Mr. G. S. Miller, jr., Cambridge, Mass., is described as follows: 



Dorsum of an obscure ocher brown, flecked with dispersed transverse 

 sooty lines. The color becomes more rusty over the loins and upon the 

 basal half of the interfemoral membrane where it is of a dull russet 

 The basal fifth is black, the remaining portion is almost white. The 

 subtip IS ocher-brown and the tip occasionallv black. On the inter- 

 femoral membrane the hair is of a dull Isabella brown,- the basal black 

 equals one-fifth of the shaft, which is scarcely lighter than the long 

 tip. Thus the shaft is not lighter tlian on the dorsum. The fold ex*- 

 tendmg from the auricle to the head is heavily furred. Of the two 

 examples one, althougli the larger, was immature, showing that varia- 

 tion m the measurements of a number of individuals may be expected. 

 Teeth,— The maxillary incisors much as in A. cinerea and A. novehora- 

 censis; the cingulum markedly developed; the first premolar is absent 

 Ihe posterior commissure of the paracone does not reach the posterior 

 border of the tooth, but adjuts against the anterior limb of the second 

 V near its tip ; the third molar as in other species. 



^Dasyptermega, Peters.-A specimen of this species from the collection of the 

 Mnseum of Comparative Zoology. The palatal rug.B are six in number. The lower 

 incisors not trifid, suheqnal, the first the largest. The inv of the ventre is with- 

 out t,p of different shade to that of the shaft. The hair is of two colors, while on 

 the dorsum it IS of three. 



