Neotropical Bats of the Genus Eptesicus. 365 



Upper surface Front's brown, the bases of tlie hairs darker 

 brown but not blackish. Hairs of under surface brown 

 basally, broadly light drab terminally. 



Skull in shape like that of E. innoxius, but much smaller. 



Dimensions of the type (the italicized measurements taken 

 ill the flesh): — 



Forearm 35 mm. 



Head and body I1.2 ; tail 35 ; ear 13. Third finger, meta- 

 car})us 32 5, first phalanx 12-7; lower leg and hind foot21"2. 



Skull : greatest length l-l'l ; condylo-basal length 13'8 ; 

 zygomatic breadth 9 ; iMtertemp')ral breadth 3"8 ; breadth of 

 brain-case 7'1 ; mastoid breadth 7*6 ; pahvto-sinual length 11 ; 

 front of canine to back of vi^ 4*9 ; front of p* to back of m"^ 3*7. 



In the paratype the forearm is longer — 37 mm., — but the 

 skull is of quite the same small size. 



Hah. Puna Island, Gulf of Guayaquil. Type from Puna. 

 Alt. 10 ra. 



Type. Adult male. B.M. no. 99. 8. 1. 1. Original num- 

 ber 1. Collected 1st November, 1899, by Perry O. Simons. 

 Two specimens. 



The type was the first mammal obtained by Mr. Simons 

 on his historic collecting-trip down the Andean region of 

 S. America. 



Although in other respects quite similar to the neighbouring 

 E. innoxius, the Puna bat is distinguishable by the small 

 size of its skull and teeth. 



Passing now further to the south, we have E.fiirinah's as 

 the smaller species of Paraguay and the Argentine (Corri- 

 entes, Misiones, &c.), but the larger would seem to need a 

 name : — 



Eptesicus argentinus, sp. n. 



The pale open-country representative of E. brasiliensis. 



Size large, even larger on the average than in brasiliensis. 

 Fur rather short, hairs of back about 5 nun. in length ; the 

 narroAV naked area often running along the edges of the back 

 and rump unusually wide and well marked. General colour 

 above quite pale, the light ends to the doisul hairs near bufEy 

 brown, therefore much paler than in the dark Brazilian forms. 

 Under surface dull whitish, the hairs slaty with whitish tips, 

 iniiuiiiiil region white. Ears and n)ombiuues brown, not 

 black. 



Skull robust, flattened, well-ridged, the zygomata broadly 

 expanded. Teeth large and heavy. 



