~ 
Neotropical Bats of the Genus Eptesicus. 365 
Upper surface Prout’s brown, the bases of the hairs darker 
brown but not blackish. Hairs of under surface brown 
basally, broadly light drab terminally. 
Skull in shape like that of #. énnowius, but much smaller. 
Dimensions of the type (the italicized measurements taken 
in the flesh) :— ; 
Forearm 35 mm. 
Head and body 42; tail 35; ear 13. Third finger, meta- 
carpus 32:5, first phalanx 12:7; lower leg and hind foot 21°2. 
Skull: greatest length 14:1; condylo-basal length 13:8 ; 
zygomatic breadth 9 ; intertemporal breadth 3°8 ; breadth of 
brain-case 7°1; mastoid breadth 7°6 ; palato-sinual length 11 ; 
front of canine to back of m® 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. 
Hab. Puna Island, Gulf of Guayaquil. ‘Type from Puna. 
Alt. 10 m. 
Type. Adult male. B.M. no. 99. 8.1.1. Original num- 
ber 1. Collected Ist 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 
Ei. innoxius, the Puna bat is distinguishable by the small 
size of its skull and teeth. 
Passing now further to the south, we have F. furinalis as 
the smaller species of Paraguay and the Argentine (Corri- 
entes, Misiones, &c.), but the larger would seem to need a 
name :— 
Eiptesicus argentinus, sp. n. 
Lhe pale open-country representative of H. brasiliensis, 
Size large, even larger on the average than in brasiliensis. 
Fur rather short, hairs of back about 5 mm. in length ; the 
narrow 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 dorsal hairs near buffy 
brown, therefore much paler than in the dark Brazilian forms. 
Under surface dull whitish, the hairs slaty with whitish tips, 
inguinal region white. Kars and membranes brown, not 
black. 
Skull robust, flattened, well-ridged, the zygomata broadly 
expanded. ‘Teeth large and heavy. 
