new GJossophagine Bats. 287 



Jlylonycteris Underiooodi^ sp. n. 



Size about as in Chccronycteris minor. Muzzle of medium 

 length, not so conspicuously wliiskered as in G. mexicana. 

 Nose-leaf small, narrow, pointed, without distinct midrib. 

 Ears fairly large, tlieir inner margin evenly convex, tip 

 rounded; outer margin slightly concave above, then convex, 

 a much sharper and deeper notch than in Choeronycteris sepa- 

 rating the pointed anlitragal part below. Wings attached to 

 the ankles. Interfemoral membrane well developed, the tip 

 of the short tail appearing in the middle of its upper surface. 

 Calcar shorter than the foot. Feet short, the claws appa- 

 rently bearing a greater proportion to their length than 

 usual. 



Fur practically confined to the body and the fleshy part of 

 the forearms and hind legs, not extending on to the wings or 

 interfemoral membranes. 



Colour dark brown (seal-brown) above, the crown of the 

 head almost black, below very slightly paler. Individually 

 the hairs of the back are tricolor, darker brown basally and 

 termhiallyj with a whitish-brown mesial ring. 



Skull with the muzzle of medium proportions, but the 

 palate is not so parallel-sided as in Choeronycteris^ the two 

 rows of teeth diverging considerably behind. Teeth generally 

 similar in form to those of Choeronycteris, but rather shorter 

 horizontally, and therefore less higlily specialized than in that 

 animal. 



Dimensions of the type : — 



Forearm 34*5 millira. 



fckull: greatest length 23; basal length 20*3; interorbital 

 breadth A 1 ; breadth across brain-case ^'(j ; tip of muzzle to 

 just behind anterior zygoma-root 9'8 ; length of palate 14-2 

 front of 

 W3 8" 8. 



Dimensions of a skin, softened and put in spirit : — 



Forearm 32*5. 



Nose-leaf, length 5*3; ear 11-5; thumb (c. u.) 10; 

 index 32; third finger, metacarpus 33*5, first phalanx 14, 

 second phalanx 18 5 ; fifth finger, metacarpus 29, first 

 phalanx 7*3, second phalanx 11; lower leg 12; hind foot, 

 s. u. 7, c. u. 9"8; calcar 6; tail 6; depth of interfemoral 

 in centre 13. 



Hah. Rancho i?edondo, Costa Rica (type). Two other 

 specimens from Tarbaca, Costa Rica. 



Type. B.M. no. 3. 2. 1. 5. Collected 30th June, 1899, by 

 C. F. Underwood. Three specimens. 



