1917.] 



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



477 



as "from the stomach of a Machcerhamphus hawk." The specimen (preserved in 

 alcohol) is practically uninjured for study. 



As noted above, Mops (A.) faradjius closely resembles osborni, but it has 

 a much shorter forearm, a slenderer body, and, though a male, is somewhat 

 smaller in both external and cranial measurements. It is also markedly 

 darker in general coloration. The type localities of the two forms 

 (Kinshasa and Faradje) are far apart and in regions of widely different 

 environment. 



68. Mops (Allomops) nanulus sp. nov. 



Type, No. 48864, cf ad., skin and skull, Niangara, Belgian Congo, Dec. 12, 1910; 

 Herbert Lang and James P. Chapin. American Museum Congo Expedition. Orig. 

 No. 1318. 



Similar in cranial characters and in dentition to Mops (A.) occipitalis, but much 

 smaller and much lighter in coloration. 



Upperparts cinnamon-brown; below with the whole median area lighter, the tips 

 of the hairs dull gray with a slight yellowish or buffy tone, the sides much like the 

 back but rather darker; extreme lower back naked or with only a slight pubescence; 

 a thin fringe of bristly hairs from the posterior border of the dorsal pelage, the longer 

 of these reaching to the base of the tail. Wing membranes from the sides of the 

 back, light brown above, somewhat paler apically and on the lower surface. Inter- 

 femoral membrane palish brown above and below. Ears of medium size and thick- 

 ness connected by a low membrane, from the back of which (most prominent in males) 

 is a tuft of lengthened hairs, as in its larger congeners; inner base of ears heavily 

 furred, and otherwise agreeing closely in form and structure with those of occi- 

 pitalis. Tragus small, pointed, black. Antitragus of medium size, broad basally, 

 convex on upper border. Tail short, rather more than the apical half free. 



Skull and dentition similar to that of A . occipitalis. 



Type, collectors' measurements: Total length, 82 mm.; head and body, 61; 

 tail, 21; foot, 9; ear, 15. Forearm (from skin), 28.5. (The type is the largest of 

 a series of 6 specimens.) 



Type and 5 topotypes (3 males, 3 females), collectors' measurements: Males, 

 total length, 78.7 (75-82), females, 76 (75-77); head and body, males 58 (56-61), 

 females, 55.7 (54-58); tail, males, 20.3 (19-21), females, 20 (19-21); foot, males 8 

 (7-8), females 9 (all 9); ear, males 15.5 (15-17), females 17 (16-18). Forearm (from 

 skin), males 28.6 (28.3-28.7), females, 27.4 (27.3-27.6). 



Skull (type), total length, 16.8; condylobasal length, 15.5; zygomatic breadth, 

 10.9; mastoid breadth, 9.6; interorbital breadth, 3.3; maxillar breadth, 7.3; breadth 

 at base of canines, 3; depth (including pterygoids), 5.7; upper toothrow (with 

 canine), 6.1; length of mandible, 11.2; height, angle to condyle, 3.5; depth at coro- 

 noid, 2.9; length of toothrow, 6.8. 



Skull, type and 5 topotypes (3 males, 3 females) : males, total length, 16.5 (16.0- 

 16.8), females 15.4 (15.3-15.6); zygomatic breadth, males 10.3 (10.5-11), females 

 9.9 (9.8-10). The females are thus smaller than the males, and they also lack the 

 extreme development of the supraoccipital region shown by the males. 



Represented by 7 specimens, all collected the same day at Niangara. 



