Neotropical Bats of the Genus Eptesicus. 3G3 



Eptesicus montosun, sp. n. 



A small Eptesicus with swollen and rounded skull. 



Size about as in ?2. brasiliensi's. Fur very long and fine, 

 liairs of back about 9 mm. in length. General colour blackisli 

 brown, lightened on the posterior back by the Front's brown 

 of the tips of the liairs. Under .surfuce also l)ro\vn, the tips of 

 the hairs paler brown. Ears and tragus apparently as in 

 hi'asiUensis. 



Skull, as compared with that of hrasiliensis, conspicuously 

 more swollen, higher in the l)rain-case, with much broader 

 and quite unridgeil interorbital region, the whole skull less 

 flattened and less ridged. 



Molars app.irently ratlier narrower transversely than in 

 hras'dieiisis, their longitudinal diameter about the same. 



Dimensions of the type : — 



Forearm 43 mm. 



Head and body 55 ; tail 43 ; third finger, metacarpus 40 ; 

 first phalanx 13 ; lower leg and hind foot (c. u.) 26. 



Skull: greatest length 1.5*6; condylo-basal length 15" 2 ; 

 basi-sinual length 12; z3'gomatic breadth 10*3; interorbital 

 breadth 4*2; breadth of brain-ca-^e 8; vertical height, in- 

 cluding bullae, 7*6 ; palato-sinual length G"2 ; front of canine 

 to back of 771^ 6 ; front of ^/ to back of m^ 4. 



Ilah. (of type). Clioro, north of Cochabaml)a, Highlatids 

 of Bolivia, on the upper waters of the K. Mamor^. Alt. 

 3600 m. 



Type. Adult male skin and skull. B.M. no. 2. 1. 1. 1. 

 Original number 1433. Collected 8tli May, 1901, by P. O. 

 Simons. Presented by Ohltit-ld Thomas. 



'' Native name Chini."— /^ 0. S. 



All the hitherto described South-American species of 

 Eptesicus have a characteristically flattened skull with widely 

 spread zygomata and narrow interorbital region, while this 

 hiirliland form differs by its much higher and more rounded 

 skull. Attention is especially drawn to the great interorbital 

 breadth and the veitical height of the brain-case. 



This is the " Ve>pcrtibo sp. — hi/airei group " of my paper 

 on Mr. Sinions's Bolivian collection *. 



An allied species is 



Eptesicus inca, sp. n. 



Near E. montosus^ but larger. Skull more heavily ridged. 

 General characters oi' inontosus, with similarly large inflated 



• Ann. Si Mnp. Nat. Hist. (7) ix. p. IL'O (iyOl>). 



