6. 



"TESPEEUGO. 



186 



margin, inner margin 



V. velatus, p. 188. 



its outer 

 convex * . 

 a". Ears veiy much longer than the 

 head, united across the forehead 

 by a distinct band. 

 a"'. Ears triangular ; inner margin 

 of the ear-conch very convex 

 in the lower third. 

 u. Ears more than one third 

 longer than the head, united 

 by a deep band ; the last 

 two caudal vertebrae free ; 



forearm 2" 1 . 



6 . Ears oval ; inner margin of the 

 ear-conch moderately convex 

 throughout. 

 /3. Ears nearly double the length 

 of the head, united by a 

 deep band ; the last and the 

 antepenultimate caudal ver- 

 tebrae free ; forearm l"-8 . . 2. V. macrotus, p. 189. 

 y. Ears about one third longer 

 than the head, united by a 

 low band ; tail and forearm 



as in the preceding species.. 3. V. montanus, p. 189. 

 b". Ears scarcely longer than the 

 head, not imited. 



4. V. magellanictis, p. 190. 



Ears shorter than the head; auditory 



hvUce ossecB moderate. 



h'. Tragus moderately long, reaching its 



greatest width slightly above the 



base of its inner margin ; postcal- 



caneal lobe very narrow or absent. 



h". Inner upper incisors with a small 



external cusp or projection near 



their extremities, disappearing as 



the teeth become worn. 



b'". Outer upper incisors minute, 



close to and slightly in front 



of the inner incisors; one or 



more caudal vertebrae quite 



free from the interfemoral 



membrane. 



a. The ears laid forwards extend 



more than midway between 



the eyes and the end of the 



muzzle ; last two caudal 



vertebrae free ; forearm 2"-25 5. V. serotinus, p. 191. 

 /3. The ears laid forwards extend 

 slightly beyond the eyes ; 

 last caudal vertebra free 



forearm 2"'15 



y. The ears laid forwards extend 

 almost as far as the end of 



6. V. andersoni, p. 195. 



* Genus Hisdoius, Gervais. 



