1917.] 



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



471 



lower incisors very small, bilobed, the outer smaller than the middle ones, postero- 

 external to them in position, often one or both outer lower incisors deciduous. Upper 

 canines very long, slender and sharp-pointed, with a broad, shallow longitudinal 

 groove on the front face, and a narrow postero-internal cingulum; lower canines 

 correspondingly slender, with a broad postero-internal cingulum. First upper 

 premolar (p 2 ) minute, in the toothrow (usually) or external to the base of the canine, 

 sometimes deciduous; p 4 about half the size of m 1 , larger than m 3 . First lower 

 premolar (p 2 ) larger than p4 in males, smaller than p4 in females, the sexual difference 

 in the size of p 2 well marked in all the (four) known species. Upper molars with m 3 

 small, about one third the size of m 2 . Molar-premolar series in both jaws heavy, 

 low and broad, with very broad mandibular rami. 



Males larger than the females, the sexual difference in size especially evident 



in the skulls, where it is emphasized by the much larger size of p 2 in the males than 

 in the females relatively to the size of p4. Ears of medium size, thick and heavy, 

 united at the base by a broad membrane, which extends forward as a conspicuous 

 protuberance in front of the ears. Tail relatively short, about two fifths of the length 

 of head and body, rather more than the apical half free. Sides of back naked, the 

 naked space continuous with the naked hind limbs and naked hinder portion of the 

 body, which is bare of fur on both surfaces posterior to a line joining the hips. From 

 the region of the hips arises a fringe of scattered blackish bristles, directed backward 

 and reaching to or beyond the middle of the uropatagium, the number of these bristly 

 hairs varying, even in different individuals of the same species, from a few to a fairly 

 conspicuous fringe. Pelage of the upperparts exceptionally short, soft and velvety; 

 on the underparts longer and more dense. Color pattern distinctive, — very dark 



