1917.] 



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



433 



oped in females. P 2 uniformly present on both sides in each of the 35 skulls, inserted 

 on the outer border of the toothrow, closely crowded in between the canine and p 3 . 



Represented by 35 specimens (16 males, 19 females, all adult, skins with perfect 

 skulls), all taken at Aba, December 13, 1911. 



The collectors' measurements from the fresh specimens (16 males, 19 females), 

 are as follows: 



Total length Head and body Tail Foot Ear 



101.2 (97-107) 65.5 (60-70) 34.2 (32-39) 12 (11-13) 21.4 (20-22) 

 9 101.4 (95-105) 65.4 (60-70) 36 (32-40) 12.2 (11-13) 21.5 (20-22) 



The forearm and skull measurements (total length and zygomatic breadth) of 

 the same specimens: 



Forearm Skull 



& 58 (56-60) 23.1 (22.5-23.7) X 13.4 (13.1-13.9) 



9 57.8 (54-60.5) 22.7 (21.9-23 3) X 13.2 (12.6-13.7) 



This large series of specimens, all taken the same day at the same locality, 

 and also all fully adult, is especially interesting from the wide range of color 

 variation it presents, which, as shown by the skulls, is wholly independent 

 of age, and probably of sex, although of the 16 specimens in the red phase 

 11 are females and 5 are males, and none of the males are nearly as red as 

 are the majority of the red phase of the females. The dark phase, on the 

 other hand, includes 11 males, while only 8 females can be assigned to it; 

 and only two of the dark males are strictly referable to the norm of the dark 

 series of females, the others being distinctly intermediate between the dark 

 and red phases. 



The dark phase may be described as follows: Upperparts, in general 

 effect, washed with drab-brown, lighter on the neck and shoulders, whitish 

 prevailing on the sides of the shoulders; fur at extreme base dusky, with a 

 broad intermediate zone of whitish, the tips of the hairs dark drab-brown, 

 giving a dark brown superficial tone to the dorsal aspect. The extent of 

 the dusky tipping varies greatly in different specimens, and may be almost 

 absent over the shoulders and especially on the sides of the shoulders, giving 

 there a prevailing whitish tone. In general the white middle zone of the 

 fur shows more or less at the surface. Underparts uniform dingy pale 

 buff with a faint superficial wash of yellowish. Basal portion of the fur 

 very pale brown, showing more or less through the pale buffy tips. 



Red phase. Upperparts cinnamon-brown, often darkening on the 

 middle of the back to nearly chestnut-brown. Fur at extreme base slightly 

 darkened, the broad middle zone pale cinnamon, the tips of the hairs dark 

 ruddy brown; sides of shoulders light yellowish white. The underparts 

 vary in different specimens from pale buffy to deep reddish ochraceous; 

 in average female specimens, pale ochraceous. This is the 'red' phase as 



