1917.] Allen, Lang and Chapin, Bats from the Belgian Congo. 463 



Measurements of the alcoholic topotype: Total length, 80; head and body, 48; 

 tail, 32; forearm, 37; third metacarpal, 39; third digit, 72; tibia, 11.8; foot, 7.7; 

 ear from crown, 9.5, from notch behind antitragus, 12.8; expanse of both ears from 

 tip to tip, 27. 



Skull (measurements of topotype in parenthesis), total length, 15.5 (16); zygo- 

 matic breadth, — (9.5); interorbital breadth, 3.5 (3.5); mastoid breadth, — (9); 

 breadth of braincase, 7.6 (7.7); maxillar breadth, 6.5 (6.8); upper toothrow (c-m 3 ), 

 5.4 (5.8); length of mandible, 10 (10.4); angle to condyle, 2.6 (2.6); depth at coro- 

 noid, 2.6 (2.6); lower toothrow, 5.9 (6.4). Upper incisors parallel, slightly separated, 

 a wide space between them and the canines; lower incisors bifid, 1-1 (in both type 

 and topotype), completely filling the space between-the canines. First upper pre- 

 molar minute, in the toothrow, separating the canine and p 4 ; first lower premolar 

 smaller and with much lower crown than the second. Premaxillse fully ossified; 

 palatal foramina coalesced, forming a small U-shaped vacuity; presphenoid pits 

 deep, slightly longer than wide; preorbital (lacrymal) processes strongly developed; 

 median crest slightly indicated, lambdoid crest moderately strong. In general feat- 

 ures the skull is as in other small species of Chcerephon. 



Chcerephon (Lophomops) chapini is represented by only the type and a 

 topotype, both old males from Farad je. It evidently has no close relation- 

 ship to any known species. Its conspicuously heavy and long particolored 

 crest distinguishes it at once from the other known species of the Lophomops 

 group. 



59. Chserephon (Lophomops) cristatus sp. nov. 

 Text Fig. 10, A, B. 



Type, No. 48844, c? ad. (skin and skull), Boma, near mouth of Congo River, 

 Belgian Congo, Jan. 26, 1915; Herbert Lang and James P. Chapin. American Mu- 

 seum Congo Expedition. Orig. No. 2628. 



Head crested, the crest arising from the posterior face of the deep membrane 

 uniting the ears. Crest (Fig. 10, A, B) shorter than in C. chapini, the hairs reddish 

 apically, the basal half darker, the transition between the two tones abrupt. Whole 

 top of the head behind the crest naked, but covered by the crest hairs when the crest 

 is laid back. Body above uniform russet, the basal portion of the fur but little lighter 

 than the tips; underparts dark cinnamon-drab, the middle area with light tips to the 

 hairs, in contrast with the sides; an indistinct median whitish band from the pecto- 

 ral region posteriorly; a narrow band of soft white fur along the inner edge of the 

 wing membrane from the humerus to the femur and continued across the lower 

 abdomen at base of the uropatagium. Face and gular region naked and blackish, 

 bordered below by a naked flesh-colored band. Wing membranes as in C. chapini 

 but whiter, the upper surface in strong contrast with the blackish limb bones; the 

 dorsal side of the membrane along the sides of the body, between humerus and femur, 

 thickly set with blackish dots, most of which support a minute bristly hair, visible 

 •only under a strong lens, and more obvious than in the specimens of C. chapini. 

 Interfemoral membrane dark slaty brown above, somewhat lighter below. No gular 

 poach. Upper lips corrugated. 



