444 



Bulletin American Museum of Natural History. [Vol. XXXVII, 



Similar in general appearance to E. tenuipinnis but smaller, with black ears and 

 feet, and wholly black above. 



Pelage of upperparts brownish black to base of hairs, which are without light tips ; 

 below the hairs of foreneck and upper chest brownish black tipped with whitish, rest 

 of lower parts clear white, the hairs dusky at base; wing membranes white above 

 and below; interfemoral membrane brownish white above, paler below; ears, feet, 

 tail and limb bones dark brown, in strong contrast with the light-colored membranes. 

 Size and general structure, including ears and tragus, as in E. tenuipinnis. 



Collectors' measurements of type: Total length, 68 mm.; head and body, 39; 

 tail, 29; foot, 6; ear, 12. Forearm (from skin), 27.5; in an adult male topotype, 

 27.9; in two subadult specimens from Niangara, & 27, 9 25. 



Skull, type, total length, 12.2; condylobasal length, 11.6; zygomatic breadth, 

 7.5; breadth of braincase, 6.6; interorbital breadth, 3.4; maxillar breadth, 5.2; 

 breadth at base of canines, 4; length of upper toothrow (c-m 3 ), 4; length of mandible, 

 8.4; angle to condyle, 1.5; depth at coronoid, 2.5. 



Represented by 4 specimens: Farad je, 2 (type skin and skull and alcoholic topo- 

 type); Niangara, 2 (subadult skins with skulls). 



E. ater is nearly related to E. tenuipinnis, from which it differs in the 

 much darker coloration of the pelage, the ears and feet blackish instead of 

 pale yellow, and in slightly smaller size. 



37. Eptesicus faradjius sp. nov. 



Type, No. 49045, 9 ad., skin and skull, Faradje, northeastern Belgian Congo 

 Feb. 21, 1911; Herbert Lang and James P. Chapin. American Museum Congo 

 Expedition. Orig. No. 1914. 



Upperparts tawny olive, the hairs dusky at extreme base; underparts similar 

 but much paler, the tips of the hairs light tawny on throat, breast and middle of 

 belly, more fulvous on side and pubic region; ears pale brown; limb bones and inter- 

 femoral membrane light brown above, paler below; wing membranes pale yellow on 

 both surfaces. 



Collectors' measurements of type: Total length, 93; head and body, 59; tail, 39; 

 foot, 8; ear, 11. Forearm (from skin), 33. 



Collectors' measurements of ten topotypes (5 males, 5 females): Total length, 

 d" 88 (83-95), 9 92.6 (90-96); head and body, 51 (46-56), 9 54.2 (52-56); 

 tail, 37 (35-38), 9 39 (35-43); foot, 8.4 (8-9), 9 8.4 (8-9); ear, 11.4 (11-12), 

 9 11.4 (11-12). Forearm (same specimens), tf 1 33.5 (32.5-35.6), 9 34.9 (32.5- 

 36.2). 



Skull (type), total length, 13.8; condylobasal length, 13; zygomatic breadth, 8.8; 

 breadth of braincase, 7; mastoid breadth, 8.2; interorbital breadth, 4; maxillar 

 breadth, 6.1; breadth at base of canines, 4.9; upper toothrow (c-m 3 ), 4.6; length of 

 mandible, 10.2; angle to condyles, 1.8; depth at coronoid, 3.2; lower toothrow, 5.3. 

 Skull, 9 topotypes (4 males, 5 females): Total length, 13.5 (13.2-13.9), 9 13.7 

 (13.4-13.7). 



Represented by 24 specimens: 14 (topotypes) from Faradje, collected February 

 18-21, March 1-30, and August 2, 1911, and 10 from Niangara, collected November 

 16-December 26, 1910. 



