12. vEsrERTiLio. 323 



of the proximal third of the tibia. Beneath, the fur extends thinly 

 as far as a line drawn between the elbow- and knee-joints, but the 

 base only of the interfemoral membrane has a few short fine hairs. 



Above dark brown at the base, becoming lighter towards the 

 extremities ; beneath black at the base of the hairs, the terminal 

 third ashy. 



The dentition is quite similar to that of V. mystadnus. Length 

 (of an adult $ preserved in alcohol), head and body 1"'6, tail l"-65, 

 head 0"-6, ear 0"-6, tragus 0"-3, forearm l"-45, thumb 0"-25, third 

 finger 2"-3, fifth finger l"-8, tibia 0"-65, foot 0"-35. 



Hah. South America : Chili ; Isle of Chiloe ; Mendoga. 



This species resembles V. mystadnus in the form of the ear-conch 

 and tragus and in the colour of the fur. It is distinguished by its 

 larger size, proportionately much longer tail (which equals the com- 

 bined length of the head and body), less convexity of lower half of 

 outer margin of the ear, and prominent ridges on the sides of the 

 muzzle formed by the glandular prominences. 



a. im. (f , al. Chili. Purchased. 



b, c. imm. sks. Chili. Purchased ' 

 d. ad. 5 , al. Mendo§a, S. America. Purchased. 



37. Vespertilio levis. 



VespertiUo levis, Is. Geoffroy, Ann. des Set. Natiir. t. iii. p. 444 

 (1824). 



Muzzle rather broad, but not short, the sides of the face from the 

 eye to the nose and to the margin of the lip smooth ; crown of the 

 head slightly and somewhat abruptly vaulted above the face-line ; 

 ears longer than the head, laid forwards the extremities project 

 about one tenth of an inch beyond the end of the muzzle ; hori- 

 zontal portion of the internal basal lobe of the ear-conch short, 

 joining the ascending portion under a right angle ; lower one third 

 of the ascending part of the inner margin straight or slightly con- 

 cave, middle third convex, upper third straight, the tip very nar- 

 rowly rounded off ; nearly the upper half of the outer margin 

 unevenly concave beneath the tip, which projects very slightly out- 

 wards, becoming gradually convex in the lower half, forming near 

 its termination a very distinct small convex lobe ; tragus moderately 

 long, attenuated in its upper third, and slightly inclined outwards 

 (Plate XIX. fig. 6, head, enlarged). 



Wings from the base of the toes ; calcaneum terminating in a 

 small projecting lobule ; free margin of the interfemoral membrane 

 between the ends of the calcanea fimbriated as in V. nattereri, and 

 fringed with a few very fine short hairs ; tip of the tail projecting. 



Teeth as in F. mystadnus. 



finge 



0"-35. 



y2 



