1917.] 



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



425 



Nycterkle. 

 13. Nycteris hispida (Schreber). 



Vespertilio hispida Schreber, Saugeth., I, p. 169, pi. lvi, 1775. Senegal. 



Eleven specimens (5 skins, 6 alcoholic), collected as follows: Boma, 3 

 (alcoholic); Stanleyville, 4 (2 alcoholic); Avakubi, 3 (1 alcoholic); Medje, 1. 



Collectors' measurements (1 male, Stanleyville, 3 females, Avakubi): 

 Total length, 99.5 (96-101); head and body, 52 (50-54); tail, 48 (45-50); 

 ear (from outer base), 23 (22-25). 



Forearm (6 specimens, Avakubi and Stanleyville), 41.3 (40-43.4). 



Skull (3, Avakubi), total length, 17.9 (17.4-18.4); zygomatic breadth, 

 10.6 (10.5-10.8). 



In the 5 skins the upperparts are dark brown (blackish brown on middle 

 of back), underparts brown, ears and membranes blackish brown. 



14. Nycteris pallida sp. nov. 



Type, No. 49144, c? ad., Faradje, Belgian Congo, March 1, 1912; Herbert Lang 

 and James P. Chapin. American Museum Congo Expedition. Orig. No. 1858. 



A pale small form of the N. hispida group, differing strongly from typical hispida 

 in its pale coloration and also slightly in smaller size. 



Above pale brown, the tips of the hairs on the lower back and sides pale fulvous; 

 underparts grayish brown; head back to the ears very pale brown, in strong contrast 

 with the body; a narrow whitish band bordering the nose pad in front and laterally; 

 ears light brown terminally, much paler basally; membranes much paler than in 

 hispida. 



Collectors' measurements of type: Total length, 92; tail, 45; foot, 10; ear, 

 21 (in skin from anterior border, 15.5). 



Additional measurements from type: Forearm, 39.5; tibia, 19; foot, 9.2. 

 Forearm in 5 alcoholics (Faradje, 3, Vankerckhovenville, 2), 37.8 (36.5-39.5). 



Skull (type), total length, 17.4; zygomatic breadth, 10.2; upper toothrow 

 (c-m 3 ), 6.5; lower jaw, 11.8; lower toothrow, 6.8. Type and three topotypes, total 

 length, 17.2 (16.9-17.4); zygomatic breadth (2 skulls), 10.2 (10.1-10.3). 



Represented by 12 specimens (3 skins, 9 alcoholics, part immature), of which 8 

 are from Faradje, and 4 from Vankerckhovenville. 



Present material indicates that N. pallida differs from N. hispida, its 

 nearest ally, in much paler coloration, including especially the ears and 

 membranes, and smaller size, averaging about 4 mm. less in the length of 

 the forearm, with other measurements proportional. N. pallida is thus 

 much smaller than N. aurita Andersen. 



