MAMMALS FROM MOUNT COFFEE, LIBERIA 647 



Cranial measurements of adult female: greatest length 25.4; basal 

 length 24; basilar length 22.4; palatal length 13.4; zygomatic breadth 

 13; interorbital breadth 4; breadth across postorbital processes 9.4; 

 greatest breadth of braincase 11 ; mastoid breadth 9.4; upper tooth- 

 row (exclusive of incisors) 9; mandible 20; mandibular toothrow 

 (exclusive of incisors) 10. 



HIPPOSIDEROS CAFFRA (Sundvall). 

 Five specimens, all males, March 27 to April 22, 1897. Although 

 apparently representing a single species these specimens show re- 

 markable variation in size. In two the forearm measures 52 mm., in 

 two others 49, while in the fifth it barely reaches 42. 



PIPISTRELLUS MINUSCULUS sp. nov. 



Type. — Adult female (in alcohol) no. 84500 U. S. National 

 Museum. Mount Coffee, Liberia, May, 1894. O. F. Cook, col- 

 lector. 



Characters. — Similar to Pipistrellus sta7?tpjlii (Jentink), but 

 smaller, the tail relatively longer and color " more reddish brown." 



Ears. — The ears are rather short; laid forward they extend to 

 extremity of muzzle. Anterior margin of conch abruptly convex 

 at base, then slightly convex to narrowly rounded tip. Posterior bor- 

 der faintly concave to middle, then somewhat more strongly convex 

 to deep notch separating antitragus from rest of ear. Antitragus 

 small but sharply defined, subquadrate in outline, its height nearly 

 equal to its width. Inner surface of conch with five or six ill-defined 

 cross ridges. 



Tragus blunt, slightly curved forward, broader above than at base. 



Membranes. — The membranes are very thin and delicate. Wings 

 from base of toes. Free border of uropatagium longer than calcar. 



Feet. — The feet are short, scarcely one-half as long as tibiae. Cal- 

 car nearly double as long as foot, terminating in a distinct lobe, and 

 noticeably keeled posteriorly. 



Fur. — Fur short, that on middle of back about 5 mm. in length. 

 It is closely confined to body, barely extending on membranes except 

 as a thin sprinkling of scattered hairs. 



Color. — Dorsal surface raw umber, slightly more yellowish posteri- 

 orly than anteriorly. Ventral surface yellowish wood-brown, in pubic 

 region tinged with gray. The hairs are everywhere slaty black 

 through basal half or more. Ears and membranes blackish brown, 



