ALLEN: BATS FROM BRITISH EAST AFRICA. 327 



Eptesicus phasma, sp. now 



Type. — Skin and skull, male, no. S279, M. C. Z., collected August 

 (1, L909, on the Mem River, British East Africa, by Glover M. Allen. 



General characters. — A small pallid species (forearm 34), with white 

 membranes; possibly related to E. tenuipinnis. 



Description. — Color of fur above from nose to root of tail pale dust 

 color, between buff and cream-buff of Ridgway's Nomenclature 

 (1886), slightly darker about the muzzle. Below, the hairs of the chin 

 are buff to the bases paling on the throat to cream-buff and on the 

 belly to pure white. The extreme bases of the hairs of the back, chest, 

 and belly are dark slaty but those of the flanks ventrally are pure 

 white throughout. 



Wing membranes from the base of the first metacarpal, extremely 

 thin and delicate; both interfemoral membrane and the wings are 

 whitish throughout, the latter, however, becoming slightly clouded 

 at their tips. Ears, forearms, feet, and tibia pale brownish. The hair 

 of the body extends on to the dorsal side of the interfemoral mem- 

 brane and on the base of the tail slightly beyond a line joining the 

 knees. Calcar long and slender with a well-marked low and elongate 

 lobe; the calcar does not terminate in a lobule. Tail vertebrae 

 entirely included within the membrane. 



Ears small, triangular, their apical margins nearly straight, nar- 

 rowly rounded at the tips; a prominent basal lobe at nearly right 

 angles to the long axis of the ear at its inner margin; externally the 

 basal notch is well developed and marks off a low rounded basal lobe. 

 Tragus short, of nearly equal breadth throughout, bluntly tapering 

 at its apex; its inner margin straight, its outer margin with a slight 

 notch about opposite the inner base, thus producing two minute lobes 

 at this point. Muzzle with rather conspicuous glandular swellings. 



Measurements. — The following measurements of the type were 

 taken in the flesh: — total length, 94 mm.; tail, 40.5; hind foot, 6; 

 ear, 11.5; tragus, 5; forearm, 34; tibia, 12.5; calcar, 14. Skull: 

 greatest length, 13.5; basal length, 10.5; palatal length, 5.4; interor- 

 bital constriction, 3.8; zygomatic width, 9 ; mastoid width, 7.8; upper 

 cheek teeth, front of canine to back of m 3 , 4.8; lower cheek teeth, 

 5.2; mandible, 10. 



Skull. — The skull is rather broad, with the anterior edges of the 

 orbits conspicuously ridged so as to produce a rather squarish rostrum. 

 Upper incisors directed sharply inward; the inner is simple, about 

 twice the length of the outer ; outer incisor with a conspicuous cingu- 



