))ew Bats a)id Rodents from S. America. 4(»5 



these teeth. Outer pair slightly larger than inner. Pre- 

 molars normal in shape and size, not of the peculiar narrow 

 elongate shape of those of Chceronycteris, but evenly oval in 

 outline, each with one main cusp and without anterior or 

 posterior secondary cusps; the anterior about two-thirds the 

 size of the posterior. Molars broader than in the allied 

 genus^ their outer border straight, inner evenly convex ; the 

 hinder of the two main cusps, which are seen in lateral view, 

 pushed inwards by an external broadening tending in the 

 direction of the usual W-shaped structure of ordinary 

 Glossophagine bats ; but the anterior main cusp absolutely 

 at the external edge of the tooth. 



Loioer teeth. — Incisors absent. Canines with well-marked 

 posterior basal ledge. Premolars quite normal in shape, 

 elongate oval in outline, increasing slightly in size from 

 before backwards, nearly touching one another, therefore 

 very different from the abnormal linear widely separated 

 lower premolars of Chceronycteris, the anterior of which is the 

 longest of the three. Lower molars nearly oval in outline, 

 with something of the normal triangle in front and a broad 

 deeply concave talon behind. 



Type : — 



Sderonycteris ega, sp. n. 



General external characters as in Chceronycteris minor. 

 Colour above Prout's brown, paler at bases of hairs, blackish 

 at tip. Under surface rather lighter, except on the chin and 

 interramia, where the colour is as dark as on the back. 

 Palate-ridges three undivided and five divided. Tail present, 

 its tip appearing on the upper surface of the membrane. 



Dimensions of the type (measured in skin) : — 



Forearm 35 mm. 



Head and body 57 ; tail 6 ; third finger, metacarpus 34, 

 first phalanx 14, second plialanx 18 ; lower leg and hind 

 foot (c. u.) 20 ; calcar 7. 



Skull : greatest length (c.) 22 ; breadth of brain-case 9 : 

 front of canine to back of m^ 7*4, greatest breadth between 

 outer corners of m^ 4*8; horizontal length of ^* 0*9, px 0*7, 

 p, 1-0. 



Bab. Ega, Amazons. 



Type. Adult female. B.M. no. 7. 1. 1. 671. Original 

 number 171. Tomes's number 212 a. Collected by H. W. 

 Bates. From the Tomes Collection. 



The type specimen has only recently had its skull extracted, 

 so that its peculiar characters have not hitherto been 

 observed. It is a most interesting form, as tending to 



