Mr. R. F. Tomes on new species of Bats. 451 



Length of the head 10 



of the ears 6 



Breadth of ears 5 



Length of the tragus . . 3| 



— — of the fore-arm 1 11^ 



of the longest finger 3 2 



of the fourth finger 2 9 



of the thumb 5 



of the tibia 1 



of the foot and claws . . 6 



of the OS calcis 11|^ 



Expanse of wings 13 2 



4. Vespertilio Pearsonii, Horsf. 



Lasiurus Pearsonii^ Horsf. Cat. Mam. Mus. E. Lid. Comp. p. 36, 

 18,51 ; Blyth, Journ. As. Soc. Bengal, no. 6. 1851, p. 524. 



This is much the largest species of the group, and probably if 

 sufficiently examined would prove to be also the most characteristic. 

 But at present I have only had the opportunity of examining three 

 specimens, all in the state of skin ; viz. the type of Dr. Horsfield's 

 description, another in the same collection from Nepal, presented by 

 Mr. Hodgson, and the third in the British Museum, from Amboyna. 

 From these examples the following description has been taken, which 

 will be followed by remarks on their individual differences. 



The top of the head is rather flat, scarcely so much elevated as in 

 V. murinus ; the muzzle is also rather broad and obtuse, as in that 

 species, and the nostrils have nearly the same form and proportions. 

 The ears are as broad as they are high, very much rounded at the 

 end, and with a distinct and evenly-defined notch, scooped in their 

 external margin. They resemble the same parts in V. emarginatuSf 

 but are much broader in relation to their length, and less deeply 

 hollowed out externally. As in that species they are thickly dotted 

 with fine glandular spots. The tragus is narrow, and tapers to an 

 acute point, with a slight outward curvature, and it is furnished 

 with a projecting angular point at its outer edge near the base. It 

 is rather more than half the length of the ear. 



The wing-membranes extend to the base of the toes, and the latter 

 are fully two-thirds of the entire length of the foot. The claws are 

 strong and hooked. The thumb is very long, and its claw also large 

 and hooked, more so relatively than in any of its congeners. The 

 tip of the tail is free from the membrane. 



The upper canines are very short, stout, and conical, with a blunt 

 inner lobe ; the lower ones are also stout and short, as are also the 

 incisors, above and below. 



The upper surface of the interfemoral membrane is more or less 

 covered with hair, varying somewhat in different individuals, and 

 the portions of the wing- membranes contiguous to the sides of the 



29* 



