3Gf) On yt;o(i-o/>ical Bats of t/te Oenus Eptesicu'. 



Dinionsioiis ot tlie type (the itcilicized luoasurenients taken 

 in the flesh) : — 



Fore:irin 45"5 mm. (iaii<>e in adults Cmm about 43). 



Head ami body O"! ; tail If If. ; eor1§. Third tinj^M-r, nu'ta- 

 carpal 42, first phahuix 15 ; lower le<>: and hind foot(c. u.) 25. 



SUull : greatest len;^th 17'3; Ijasi-^inual lenu;th IS'T) ; 

 zyuomatic breadth 12"5 ; iiitcrtcinporal breadth 8*9; breailth 

 «f brair.-ease 8 ; palato-sinual length of front of canine to 

 back of in^ tr7 ; front of p"* to back of m' 4*5. 



Ilal). Corrienies. Type Ironi Goya, on the Parana. Alt. 

 GOO'. 



Ti/pe. Adult female. B.M. no. 98. '^. 4. 6. Orio^inal 

 iiiiinher 18. Collectetl IGth December, 1895, by R. Perrens. 

 Picsented by OKIHeld Thomas. JOigiit specimens. 



Tile c(»nil)ination of lar^e size and comparatively pale 

 c<dour will at once distinguish this species from any other in 

 y. America. 



A'so in the Ar^^entine, just to the south of Goya, there is 

 another species which in size is at the opposite polo huu) 

 E. argcidinus, being about the smallest species in S. 

 America : — 



Eptesicus Jidelisj sp. n. 



Size very small, slightly smaller even than K. diminutus 

 and pumcus. Fur fairly long, hairs of back about 7 mm. in 

 length ; edges of ■\ving-niembranes liaiiy for about half a 

 centimetre out from the body, in contrast to E. arffenliuus, 

 where there is even a naked edging on the body itself; inter- 

 femoral membrane and base of tail also hairy for about a 

 quarter its length. Tidl very short, even relatively to the 

 small size of the aninnd ; its extreme tip only exserteil. Ears 

 and tragus small, the inner edge of the latter slightly con- 

 cave. Gent ral colour, so far as can be seen in a spirit- 

 specimen, brown, not black, the ends of the hairs a little 

 paler ; under surface brown, with whitish ti])S to the hairs ; 

 membranes brown throughout. 



Skull low, smooth, unriilged, with comparatively broad 

 iiiteriemporal region and scarcely percej)tible sagittal and 

 lainlidoid crests. Canines proportionally rather short. 



Dimen.-ions of the type (measured on the spirit-speci- 

 men) : — 



Eurearm 34 mm. 



Head and body 50; tail 32; ear 12'5 ; tragus on iinirr 

 edge 4"2 ; third finger, nietatragus 29, first phalanx 11; 

 lower leg and hind foot (c. u.) 19*5. 



