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



15. Nycteris avakubia sp. nov. 



Type (and only specimen, in alcohol), No. 49403, d" ad., Avakubi, Belgian 

 Congo, September, 1913; Herbert Lang and James P. Chapin. American Museum 

 Congo Expedition. Orig. No. 2623. 



A member of the N. hispida group, intermediate in size between N. hispida and 

 N. grandis. Upper incisors trifid, p 4 large, fully one third the size of p 3 , and similar 



Fig. 3. Nycteris avakubia. Head, from field sketch of type, No. 49403, male, f . 



to it in general form. Coloration not distinctive, but very dark including ears and 

 membranes, in the single specimen in alcohol. 



Total length, 137 (150, 1 144.7); head and body, 63 (— , 71); tail, 65 (70, 73.7); 

 ear, 25 (32, 30.5); forearm, 51 (59.5, 57); third finger, metacarp, 40 (44, 43.2); 

 tibia, 30 (25.5, 31.8); foot, 12 (18.5, 15.2); calcaneum, 20 (23, 22.9). 



Skull, total length, 22.4; zygomatic breadth, 12.9; upper toothrow (c-m 3 ), 7.7; 

 length of mandible, 15.1; lower toothrow (c-m 3 ), 8.4. 



Represented only by the type (in alcohol) taken at Avakubi. 



16. Nycteris arge (Thomas). 



Petalia arge Thomas, Ann. and Mag. Nat. Hist. (7), XII, p. 633, Dec. 1903. 

 Efulen, Cameroons. 



Twelve specimens (4 males, 8 females, all adult, of which 4 are alco- 

 holics), collected as follows: Avakubi, 8 (6 skins, 2 alcoholic), Oct. 13, 



1 The first measurements in parenthesis are of Nycteris grandis as given by Peters (Monatsb. Akad. 

 Wissens. Berlin, 1866, p. 672) from a specimen in the British Museum; the second are from apparently 

 the same specimen as given by Dobson (Cat. Chiropt. Br. Mus., 1878, p. 164). 



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