Zoological Society, 51 



the interfemoral membrane ample, naked above and below, excepting 

 quite at the base ; the tail is enclosed to the point in this membrane ; 

 the thumb is moderate. 



Vespertilio EscnscHOLTZii. Vesp. vellere longo fusco-nigricante, 

 corpore suhtils pilis apicibus cinerascentibus ; ar tubus /us cis ; au- 

 ribus brevibus ; tragis angustis, ad apicem rotundatis, antice emar- 

 ginatis. 



unc. lin. 

 Longitudo ab apice rostri ad caudje basin. ... 2 



caudde 2 



antibrachii 1 9 



auris Sj 



Alarum amplitudo 12 



Incisor teeth -^; the outermost incisor of the upper jaw is smaller 

 than the inner one. The forehead is much arched, and separated, 

 as it were, from the muzzle by a deep transverse depression; on each 

 side of the head is a naked groove, which runs over the eye. The 

 muzzle is short and rounded, naked at the tip only, the other parts 

 moderately well clothed with hairs ; the nostrils open almost in front, 

 and are more than usually approximated; their upper boundary 

 is prominent, and there is a deep groove between them. On the 

 inner side of the upper lip are two small fleshy folds, and some com- 

 pressed tubercles situated toward the angle of the mouth ; the lower 

 lip has a narrow triangular naked area at the tip. The ears are 

 short, broad and rounded, but have the upper margin subtruncated; 

 on the inner side are two transverse ridges ; the lower part of the 

 ear is extended forwards to the angle of the mouth. The tragus is 

 narrow, curved, rounded at the point, indistinctly emarginated on 

 the outer side, and about 2f lines in length. The wings are rather 

 narrow, and extend along the hind-leg to the distal end of the tibia 

 only. The hind-legs are moderate ; the metatarsus narrow and lon^, 

 the distance from the heel to the base of the toes exceeding the toes 

 in length ; the toes are rather short and nearly equal. The inter- 

 femoral membrane is ample, naked, excepting at the base ; the heel- 

 cartilage is short ; the tail enclosed in the interfemoral membrane to 

 the point ; the thumb is very small. 



Of the species deiicribed in this paper, Vespertilio Eschscholtzii 

 approaches most nearly to the V. trisiis ; it is much smaller, how- 

 ever, than that animal, has the thumb smaller in proportion, and its 

 colouring is less dark. Among the species of M. Temminck's Mo- 

 nograph our V. trisiis most nearly resembles, in the form of its head 

 and ears, the V. blepotis (pi. 53. fig. 2.); the V. Eschscholtzii (of 

 which Mr. Cuming brought home several specimens) is at least one- 

 third smaller. 



' Vespertilio macrotausus. Vesp^ supra cinereus, subtils albicans ; 

 auribus longis, angustis, ad apicem acutis, postice fere rectis ; 

 trago elongato, attenuato, acuto; alis ampUsfuscis^ ad basin pal' 

 lidioribus. 



E3 



