1917.] Allen, Lang and Chapin, Bats from the Belgian Congo. 



443 



subequal upper incisors should render the present form easily recognizable. 

 As said above, it is about the size of P. nanus, from which it differs strik- 

 ingly in coloration, in the shape of the ears, and in the character of the upper 

 incisors and upper premolars. It does not appear closely related to any 

 described species. 



33. Pipistrellus musciculus Thomas. 



Pipistrellus musciculus Thomas, Ann. and Mag. Nat. Hist. (8), XI, p. 316, 

 March, 1913. Bitye, Ja River, S. E. Camaroons. Alt. 2000 feet. 



One specimen, adult female, in alcohol, Avakubi, Feb. 26, 1914. Fore- 

 arm, 25.2; skull, total length, 11; zygomatic breadth, 7.7. 



34. Scotozous ruppelii {Fischer). 

 V[espertilio] ruppelii Fischer, Synop. Mamm., 1829, p. 109. Dongola. 



One specimen, adult male in alcohol, Poko, August, 1912. 

 Forearm, 31.3. Skull, total length, 13.1; condylobasal length, 12.5; 

 zygomatic breadth, 9.3; breadth of braincase, 7.2; upper toothrow (c-m 3 ) 

 4.5; length of mandible, 8.6; lower toothrow (c-m 3 ), 5.1. 



35. Eptesicus tenuipinnis (Peters). 



Vesperus tenuipinnis Peters, Monatsb. Akad. Berlin, 1872, p. 263. Guinea. — 

 Noack, Zool. Jahrb., IV, 1889, p. 218. Kuilu-Fluss, Lower Congo district. 



Seven specimens (4 skins and skulls, 3 alcoholic), Ngayu, near Avakubi, 

 December, 1909. 



Collectors' measurements (1 male, 3 females) : Total length, 71 (68-73) ; 

 head and body, 42 (40-44); tail, 29.5 (28-31); foot, 8 (8-8); ear, 11.5 

 (11-12). 



Forearm (from skins), same specimens, 28.8 (27.9-29.4); two adults in 

 alcohol, male 27.5, female 28. Skulls (four specimens), total length, 12.2 

 (11.9-12.9); breadth of braincase, 6.2 (6-6.3). 



In this series the ears are white; the hairtips on the upperparts are 

 slightly silvery yellowish in two specimens, nearly absent in the other 

 two. Membranes pale yellow in dry skins, pure white in alcoholic speci- 

 mens. 



36. Eptesicus ater sp. nov. 



Type, No. 48988, d 1 ad., skin and skull, Faradje, March 1, 1911; Herbert Lang 

 and James P. Chapin. American Museum Congo Expedition. Orig. No. 1466. 



