1917.] 



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



465 



Above hair-brown, with a slight grayish sheen; below a narrow median whitish 

 band from breast to anal region, and a narrow white border at base of wing membranes 

 from humerus to femur; rest of underparts like the back but without the grayish 

 sheen; membranes lightish brown above and below. Male with a conspicuous cin- 

 namon-brown crest, lacking in the female. 



Ears thin, dark brown, rising separately from the crown, the intervening space 

 being occupied by an erectile membrane, convex above and about 5 mm. high, from 

 the back of which arises, in the male, a thick mass of brown hairs, about 7 mm. in 

 length and reaching 3 mm. above the crest of the convex membrane (Fig. 11); 

 the basal three fifths of the hairs a darker shade of cinnamon-brown than the apical 

 two fifths; in females (at least in dry skins) the membrane is directed backward, 



$ ? 



Fig. 11. Chserephon (Lophomops) abse. d\ crown view of head, male; $ , crown of head, fe- 

 male, f. 



covering the crown, which is naked or covered only with a slight pubescence on the 

 upper border and in front ; crown beneath bare (as seen by softening and raising the 

 disk or lappet). 1 The size of the lappet varies in different specimens, being not 

 fully developed in the younger examples. 



Skull with the braincase broad and flat, rising only slightly above the rostral 

 portion of the skull. Sagittal crest weakly developed or barely indicated; lambdoid 

 crest moderate; preorbital processes strongly developed; premaxillse well ossified 

 in old skulls, but in young adults there is often a small U-shaped vacuity behind the 

 incisors. 



Collectors' measurements of type: Total length, 103 mm.; head and body, 69; 

 tail, 34; foot, 10; ear, 17. Forearm (from skin), 43. 



Collectors' measurements of type and 22 topotypes: Total length, 102 (97-107); 

 head and body, 67.3 (62-73); tail, 33 (29-35); foot, 10.6 (10-11); ear, 18 (17-19). 



Forearm, from skin (same specimens), 42 (40-44). 



Skull (type), total length, 18.5; condylobasal length, 17.3; zygomatic breadth, 

 11.2; mastoid breadth, 10.7; interorbital breadth, 3.8; maxillar breadth, 8.1; 



1 Unfortunately there are no alcoholic specimens of this species available for examination, the 

 supply of alcohol having given out on this part of the journey, and the collectors were for some weeks 

 unable to renew it. A considerable number of the skins, however, have been softened for examination, 

 with results as here detailed. The membraneous lappet appears to arise just behind the inner base of 

 the ears and to be not actually joined to them. 



