12. VKSPERimo. 321 



inner margin straight, outer margin slightly concave above, indi- 

 stinctly toothed above, the rounded lobule at the base convex, not 

 attenuated. Nostrils separated by a space equal in vsridth to double 

 their transverse diameter. The vrhole face, as far as the naked ex- 

 tremity of the nose, thicldy covered with hair. 



The two upper incisors on each side are separated from the canines 

 by a space equal to the transverse diameter of the base of the outer 

 incisor. The inner incisor is half as thick again as the outer, and 

 has a small basal cusp externally and posteriorly; the first and 

 second upper premolars stand in the tooth-row. 



Wings from the base of the toes ; metacarpal bone of the fifth 

 finger slightly longer than that of the fourth; above, the wing- 

 membrane along the sides of the body and the basal fourth of the 

 interfemoral is clothed with hair ; beneath, the wing-membrane is 

 similarly but less densely covered as far as a line drawn from the 

 elbow to the second fourth of the tibia. Tail as long as the head 

 and body, of eleven vertebrae, whereof the last very short one pro- 

 jects. Sole of the foot broad and without transverse elevations. 

 The cartilaginous calcaneum extends halfway between the heel and 

 the extremity of the tail, and has a narrow cutaneous margin behind 

 its basal half. 



Fur uniform dark brown above ; beneath, the base of the hairs 

 is dark brown, the extremities brownish white. 



Length, head and body l"-8, taU l"-8, head 0"-65, ear 0"-65 x 0"-3, 

 tragus 0"-3, forearm l"-6, thumb 0"-3 ; third finger — metacarp. 

 l"-4, 1st. ph. 0"-46, 2nd ph. 0"-65 ; fifth finger— metacarp. l"-3, 

 1st ph. 0"-37, 2nd ph. 0"-32 ; tibia 0"-65, foot 0"-24. 



Hah. South America (Chimborazo, at 9000 to 10000 feet). 



Dr. Peters remarks that, " from the above description, this species 

 may be readily distinguished from its allies V. subulattcs, yuma- 

 neTisis, and affinis. In none of these species are the ears so pointed, 

 and in none has the tragus this form. V. affinis, which resembles 

 it most in the colour of the fur, has quite a difi'erent tragus. Of 

 the hitherto described South-American species, V. polythrix, Is. 

 Geoffr., which I have not sufficiently compared with it, may stand 

 nearest to it." 



35. Vespertilio polythrix. 



Vespertilio polythrix, Is. Geoffroy, Amial. des Sci. Natur. t. iii. p. 443 

 (1824) ; Temminck, Monogr. Mammal, ii. p. 248 (1885-41) ; 

 Wagner, Suppl. Schreh. Sdugeth. i. p. 535, v. p. 768 (1844-55). 



Ears as in V. mystaciniis, but narrower above, and the lower half 

 of the outer margin is less convex ; the tragus is slightly curved 

 outwards above, the muzzle is thicker and shorter, and the distance 

 between the orbits greater. 



Wings from the base of the toes or close thereto ; extreme tip of 

 the taU projecting. 



Fur not long, but peculiarly dense and woolly, extending as 

 thickly upon the muzzle as upon the crown of the head, and leaving 



T 



