22 FAUNA AMERICANA. 



ed, obtuse at tip ; interfemoral membrane naked, 

 including the tail to one half the penultimate joint-^ 



Total length five inches ; tail one inch and a 

 half; expansion thirteen inches. 



Inhabits the Western States. 



Vespertilio siibulatiis, Say. Long's Exp. Vol. 

 ii. p. 65. I believe this species to be merely a 

 variety of the V. car oliuiensis, (Geoff.) from which 

 it differs slightly in colour, and in the form of the 

 auriculum.* 



Genus. 



Taphozoiis, taphiens, Geoff. 

 Vespertilio, Schreb. MuUer. 

 Saccopteryx, Illig. 



CHARACTERS. 



r Incisor 0. 

 fsuperior 10 or 12. < Canine 2. 



Dental formula—Teeth 26 or 28 J ^ ^^^l^'" V ^^' 



] r Incisor 4. 



Linferior 16. < Canine 2. ' 



C Molar 10. ' 



Nose not furnished with membranous folds, or 

 operculi ; superior lip very thick; ears of moderate 

 size ; tail composed of six vertebrae, free above 

 the membrane; interfemoral membrane extensive; 

 posterior border triangular. 



* It is to be regretted that the dental formula has been ne- 

 glected in the descriptions of the two last species, which pre- 

 vents us from arranging them ia systematic order witli certainty. 



