TTTE GEORfJIAN RAT. 



629 



Genus Pipisthetj^i s Kaiip. 



Pipisirellus Kaup, Skizzirte Entvvick. Gesch. u. natiirl. Syst. 

 d. europ. Thierw., I, p. 98, 1829. 



Dental formula.— 1, §eI; C, jEti', Pm, M, = 34. 



Generic characters. — The American species of this genus are 

 small and weak. The ears (fig. 25, d) are proportioned much as in 

 Myotis, but the tragus is bent forward at the tip. The Indiana 

 species further differs from any of the Myotis, in this region, in 

 that the forearm and fingers are paler in color than the wing mem- 

 branes about them. 



The skull is small and weak, but broad for its size and rounded. 

 The genus can always be distinguished from our other bats by its 

 dentition, the formula being different from that of any other Ameri- 

 can genus. 



The genus is of almost world-wide distribution, though not 

 known from South America. The single species occurring in In- 

 diana is the smallest of our bats and one of the smallest mammals 

 known. 



PIPISTRELLUS SUBFLAVUS (F. Cuvier). 

 GEORGIAN BAT. 



Vespertilio suhflavus F. Cuvier, Nouv. Ann. Mus. d'Hist. Nat- 

 urelle, Paris, p. 17, 1832. 



Vesperugo carolinensis Evermann and Butler, Proc. Ind. Acad. 

 Sci. for 1893, p. 135, 1894. 



Pipisirellus suhflavus Miller, N. Am. Fauna, No. 13, p. 90, 1897. 



Diagnostic characters. — The smallest bat found east of the Mis- 

 sissippi and the only one having the dental formula given above. 

 Color, light yellowish brown, the hairs being darker at the tips, but 

 these are too short to hide the predominant tint. 



Description. — The color is pale golden brow^n, overlaid on the 

 back by the darker chestnut tips of the hairs. On the under side 

 the general color appears paler because the darker tips are lacking. 

 The hairs are everywhere plumbeous at the base. Ears and mem- 

 branes blackish, but the forearms and fingers of the living animals 

 are always yellowish brown in contrast to the darker membranes 

 surrounding them. 



The ears (fig. 25, d) are of moderate length, reaching to, or 

 slightly beyond the -nostril when laid forward. In shape they bear a 

 strong resemblance to Myotis hicifugus, but the tip is more bluntly 



