462 On a TKic Bai frum East Africa. 



posJeio-intenial cingnlar cusp at its base ; outer incisor quite 

 small, its main cusp about halt' the heit^ht of the inner incisor, 

 also wilh a small internal basal cusp. Large premolar 

 pressed close up against the back of the canine; last upper 

 molar triangular, with a well-developed posterior lobe, in 

 correspondence with which the talon of the last lower molar 

 is large and tricuspid. Lower incisors trifid, overlapping; 

 anterior lower premolar about one half the height and one 

 fourth the area in cross-section of the posterior one. 



Dimensions of the type (measured in skin) : — 



Forearm 37 millira. 



Head and bod}- (approximate) 50; ear (dry and no doubt 

 contracted) 21; tragus, length on inner edge 6'3, breadth 

 lasally 3*5 ; metacarpus of third finger 35 ; first phalanx 13 ; 

 tibia 13'5 ; hind foot, s, u, 7, c. u. 7*7 ; calcar (c.) 15. 



Skull: greatest length 15*7; basipalatal length in middle 

 line 12'8; interorbital breadth 5; intertemporal breadth 3*6; 

 breadth of brain-case 7*8 ; palate length &&. Front of lower 

 canine to back of r/1.3 5'6. 



Hah. Kitui, British East Africa. Altitude about 3500 feet. 



Tijpe. Male. Original number 64. Collected 7th January, 

 1901, by Dr. S. L. Hinde. 



1 have ventured to name this interesting bat in honour of 

 my friend Mr. W. E. de Winton, to whose labours on the 

 small mammals of Africa all naturalists, and I especially, have 

 been so constantly indebted for assistance. 



In working out Lcrphotis I have had occasion to investigate 

 the question as to the generic separation of the Serotine group 

 from the other species of Vesjjertilio, as advocated in 

 Piof. M^hely's admirable work on the bats of Hungary. No 

 doubt tlie species examined by him, V. murinus and Niissoni 

 on the one hand and V. serotinus on the other, are fairly far 

 apart ; but in my opinion the exotic species seem to render the 

 separation of ''^/)/e.sYc?is " from the rest quite impossible, such 

 species as V. vagalurus^ Innesi, capensis^ and miiiutus by no 

 means falling naturally into one or other of the two groups. 

 The characters drawn by Prof. M^hely from the cranial crests, 

 the shape of the tragus, and the insertion of the wing-mem- 

 branes do not by any means run parallel throughout the series, 

 and 1 am convinced that it is better for the present not to 

 recognize Eptesicus as distinct from Vespertilio. 



