462 On a new Bat from East Africa. 
postero-internal cingular cusp at its base; outer incisor quite 
small, its main cusp about half the height of the inner incisor, 
also with 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 millim. 
Head and body (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; calear (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 6°6. Front of lower 
canine to back of m.3 5:6. 
Hab. Kitui, British East Africa. Altitude about 3500 feet. 
Type. Male. Original number 64. Collected 7th January, 
1901, by Dr. S..L. Hinde. 
I 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 Lephotis I have had occasion to investigate 
the question as to the generic separation of the Serotine group 
from the other species of Vespertilio, as advocated in 
Prof. Méhely’s admirable work on the bats of Hungary. No 
doubt the species examined by him, V. murt¢nus and Ni/ssont 
on the one hand and V. serotenus on the other, are fairly far 
apart; but in my opinion the exotic species seem to render the 
separation of “‘Hptesicus”’ from the rest quite impossible, such 
species as V. megalurus, Innesi, capensis, and minutus by no 
means falling naturally into one or other of the two groups. 
The characters drawn by Prof. Méhely 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 I am convinced that it is better for the present not to 
recognize Eptesicus as distinct from Vespertilio. 
