448 On a new Bat from Northern Nigeria. 



Fur 3*5 mm. in length on the shoulders. General colour 

 sepia-brown, but the light bases of the hairs showing through, 

 especially across- the shoulders, where the hairs are promi- 

 nently buffy whitish for the greater part of their length, the 

 tips only brown. Under surface dull buffy whitish, the 

 throat clearer white, but nowhere so pure a white as in 

 S. hirundo. Membranes blackish brown throughout. Tragus 

 short, broad, rounded, slightly incurved, the inner margin 

 concave. Wings to the end of the metatarsus. A distinct 

 postcalcarial lobule present. 



Skull, as compared with that of S. hirundo, larger, more 

 rounded, higher, and less flattened than in S. hirundo, and 

 still more so in comparison with the other species. The inter- 

 orbital broadening less noticeable than in any known species. 



Dentition as in S. hirundo, except that minute anterior 

 premolars are present on each side, standing in the notch in 

 the posterior base of the canines. 



Dimensions of the type (the italicized measurements taken 

 in the flesh) : — 



Forearm 36 mm. 



Head and body 51 ; tail 36 ; ear 12 ; third ringer, meta- 

 carpus 34, first phalanx 11*2 • lower legand hind foot (c.u.) 20. 



Skull : occiput to base of canine 13*7 ; condylo-basal 

 length 13'3 ; interorbital breadth 6'8 ; intertemporal breadth 

 4'8 ; breadth of brain-case 8*5 ; front of canine to back of 

 m z 5*6 ; front of p 1 to back of m 2 3*7. 



Bab. Kabwir, Northern Nigeria. Alt. 2500'. 



Type. Young adult female. B.M. no. 15. 10. 8. 1. 

 Original number 70. Collected July 28, 1915, and presented 

 to the National Museum by Dr. J. C. Fox. 



This species differs from S. hirundo by its larger size, 

 higher skull, and more Obviously bicolor fur. The type of 

 S. hirundo is a very old female with worn teeth. 



The inconvenient variability in the presence or absence of 

 the small upper premolars is a character of Scoto3cus unique 

 in the Vespertilionidas. How far these teeth will prove to be 

 generally constant within each species remains to be seen, 

 but in S. hindei, at least, they are absolutely inconstant. 



The specific name is given in commemoration of Dr. Fox's 

 escape from the peaceful liner 'Falaba/ barbarously sunk on 

 its way out to Africa. 



