464 



Bulletin American Museum of Natural History. [Vol. XXXVII, 



Collectors' measurements of type: Total length, 87 mm.; head and body, 56; 

 tail, 31; foot, 9; ear, 13. Additional measurements from the dry skin: Forearm, 

 36; third metacarpal, 35; tibia, 10; foot, 8.7; thumb, 6; ear from crown, 9.2; length 

 of crest hairs, 9.5. 



Three male topotypes (Nos. 49216, 49237, 49359) in alcohol: Total length, 84, 

 83, 80; head and body, 51.5, 53, 48; tail, 32, 31, 32; forearm, 36, 36.2, 36.4; third 



B A 

 Fig. 10. Chserephon (Lophomops) cristatus. Adult male (No. 49259). A, crest erect; B, crest 

 laid back. All f . 



metacarpal, 36, 34, 35; third digit, 66. 65, 66.5; ear from crown, 9, 8, 8; height from 

 notch behind antitragus, 14, 13, 13.5; extent of both ears from tip to tip, 28, 29, 29; 

 tibia, 11, 11.5, 11; foot, 7, 6.7, 8; length of crest, 9, 8, 9; width at base, about 6.5. 



Skull, type (topotype No. 49216 in parenthesis), total length, 16.3 (16); zygo- 

 matic breadth, 9.7 (9.8); mastoid breadth, 9 (9.2); interorbital breadth, 3.6 (3.8); 

 maxillar breadth, 7 (7.2); breadth of braincase, 8 (8); depth of skull at pterygoids, 

 6 (6.3); upper toothrow (c-m 3 ), 5.5 (5.7); length of mandible, 10 (10.3); angle to 

 condyle, 3 (3.2); depth at coronoid, 2.8 (2.8); lower toothrow, 6 (6.2). 



Chcerephon (Lophomops) cristatus is represented by the type and three 

 topotypes, all collected at Boma, January 25-29 and June 15, 1915. The 

 type lacks the middle pair and one of the outer lower incisors, which had 

 been shed in life; one of the topotypes has only the middle pair, which 

 occupies the whole space between the canines; the other has the middle pair 

 and a minute outer incisor on the left side, showing that in the Lophomops 

 group the lower incisors are doubtless normally 2-2. This species is slightly 

 larger than C. chapini and differs from it strikingly in coloration, aside from 

 the difference in the color and length of the crest. 



60. Chserephon (Lophomops) abae sp. nov. 

 Text Fig. 11. 



Type, No. 48887, 9 ad., skin and skull, Aba, northeastern Belgian Congo, Dec. 

 17, 1911; Herbert Lang and James P. Chapin. American Museum Congo Expedi- 

 tion. Orig. No. 1823. 



