1917.] 



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



455 



53. Nyctinomus cisturus Thomas. 



Nyctinomus cisturus Thomas, Ann. and Mag. Nat. Hist. (7), XII, p. 502, Nov. 

 1903. Mangala, east bank of Nile, 25 miles north of Gondokoro, Kordofan. 



One specimen, No. 48842, subadult male, skin and skull, Niangara, 

 Dec. 10, 1910. 



This specimen agrees so completely with the description of N. cisturus 

 (type locality, Mangala, 25 miles north of Gondokoro on the upper Nile 

 River), that it may be confidently assigned to this species, although the 

 presence of the large anal gland, noted in the description of the unique type, 

 cannot be positively determined from the skin. 



Collectors' measurements: Total length, 128 mm.; head and body, 

 95; tail, 33; foot, 12; ear, 19. Forearm (from skin), 46.6. 



Skull, total length, 19.5; condylobasal length, 17.8; zygomatic breadth^ 

 11.5; mastoid breadth, 10.6; maxillar breadth, 8; breadth of braincase,, 

 9.3; upper toothrow (c-m 3 ), 6.8. 



Above dark brown; below similar, without white on the median line, 

 but with a narrow edging of white at base of wing membranes between 

 humerus and femur. Wing membranes above blackish brown proximally, 

 lighter brown and translucent beyond the fourth digit. 



54. Nyctinomus ochraceus sp. nov. 



Type, No. 48821, 9 ad. (skin and skull), Medje, March 16, 1910; Herbert Lang 

 and James P. Chapin. American Museum Congo Expedition. Orig. No. 745. 



Ears thick, united at base in front. Coloration unusual for a molossid. 



Above, superficially, dark chestnut-brown, the hairs ochraceous-buff basally, 

 showing more or less at the surface, especially on the shoulders and sides of the neck 

 where it often gives the prevailing tone to the coloration; below orange, varying in 

 tone in different specimens from pale to deep orange. A tuft of lengthened dark 

 chestnut-colored hairs on the front part of the crown behind the connecting membrane 

 of the ears. Ears blackish brown. Membranes naked; wing membranes from upper 

 part of tibia; face naked, brownish. Interfemoral membrane narrow, much more 

 than half the tail free. Tragus small, narrow and pointed, a little higher than wide. 

 Antitragus low, evenly rounded above, broader at base than high, about 5.5 X 4.5 

 mm. 



Collectors' measurements of type: Total length, 105 mm.; head and body, 72; 

 tail, 33; foot, 11; ear, 18. Forearm (in skin), 37.7. 



Collectors' measurements of type and 16 topotypes; Total length, 103 (100-106); 

 head and body, 71.6 (68-73); tail, 31 (29-34); foot, 11 (all 11); ear, 17.5 (17-19). 



Forearm, same specimens, 38 (37.3-39.3). 



Skull (type), total length, 18.6; condylobasal length, 16.6; zygomatic breadth, 

 11.7; mastoid breadth, 10.8; breadth of braincase, 9; maxillar breadth, 8.3; inter- 



