British East Africa and the Cameroons. 207 



inner base; inner margin straight, tip rounrled, outer margin 

 gently convex, ending below in a small basal lobule. Thumbs 

 short, with thickened but not enlarged basal pad. Wings from 

 the base of the toes. Calcars about equal in length to the 

 free border of the uropatagium ; postcalcareal lobules distinct 

 but narrow. Tail involved iti membrane almost to the tip. 

 Penis very long, slender. 



Fur 3'5-40 mm. long on back. Uniformly dusky browti 

 above, scarcely paler below. Membranes blackish brown 

 throughout, without any trace of white margins. 



Skull broad, stout and flattened, conspicuously broader and 

 lieavier, especially anteriorly, than in P. pipistrellus, which 

 has a much longer forearm. Upper profile straight, tlie 

 frontal region not inflated. 



Inner upper incisors very thick, bifid ; the postero-external 

 cusp nearly as long as the main one ; outer incisor slender, 

 unicuspid, reaching about halfway from the cingulum to the 

 tip of the inner tooth. Small upper premolar in the inner 

 angle between the canine and large premolar, which touch 

 one another outside it ; not visible from without. Lower 

 incisors broad, bifid. First lower premolar about three 

 fourths the height of the second. 



Dimensions of the type (measured in spirit) : — 



Foiearm 28 mm. 



Head and body 47; tail 27; ear 10; tragus on inner 

 edge 3*5 ; thumb, free of membrane (c. u.) 4 ; third finger, 

 metacarpus 26, 1st phalanx 9, 2nd phalaiiX 8*8 ; fitth finger 

 37 ; lower leg 12 ; hind foot, from back of calcar (c. u.) 7 ; 

 penis 11. 



Skull: greatest length 12*7; mastoid breadth 7"7. 



Hah. Efulen, Cameroons. 



Type. Adult male. Collected by G. L. Bates. One 

 specimen. 



This bat, with the short forearm of such pigmy species as 

 ripistrelliis Stampflii and minusculus, has a very much laro-er 

 body and head. The breadth and flatness of the skull are 

 particularly noticeable. 



Scotophilus nigrita colzas, subsp. n. 



A richly yellow (almost orange) bellied race of S. nigrita. 



General characters as in this species, which is Dobson's 

 " S. borbom'cus." Fur long, rather shaggy ; hairs of back 

 8-9 mm. in length. General colour above (of the tips of the 

 hairs) olivaceous, but the bases of the hairs are a dull sulphur- 

 yellow, which shows through on the upper surface. Below 



