VESPERTILIONID^. — VII. 23 



small, fox-like, with high forehead and pointed snout; 

 ears large, oval, twice the height of the erect tragus; 

 wings naked; interfemoral membrane naked except at 

 base, face whiskered; color dull olive-brown. L. 3; E. 

 9; T. 1^. N.Am.; abundant every where. A small and 

 very variable species. ( T^. lucifugus, Le 0.) 

 ** Teeth 36; molars |:f. (Vesper ides.) 



2. V. noctivagans, LeC. Silver Black Bat. Tragus 

 almost as broad as high, scarcely one-third height of ear; 

 femoral membrane entirely though scantily furred; fur 

 long and silky, black, usually with silvery tips to the 

 hairs. L. 3^; E. 12; T. 1^. U. S. generally. 



*** Teeth 34; molars -f.'f ; stouter species, with thicker wings and 

 more leathery ears. (Vespenigo.) 



3. /. georgianus, F. Cuvier. Georgia Bat. Tragus 

 slender, erect, half the height of the auricle; upper in- 

 cisors about equal in size; femoral membrane one-third 

 furred; dark reddish brown, brighter forwards. L. 3; 

 E. 9; T. 1^. Maine to Texas; chiefly southward. 



**** Teeth 32; molars f.f; stout species. (Vesperus.) 



4. /. fuscus, Beauv. Carolina Bat. Dusky Bat. 

 Tragus never pointed, nearly half as high as auricle; 



wings naked; interfemoral membrane furred at base; 

 ears more or less turned outward; upper lateral incisors 

 small, scarcely visible. L. 3 to 4; E. 12; T. 1^. U. S.; 

 a widely diffused species. ( V. caroUneiisis^ Geoff. St. 

 Hilaire.) 



2. ATA LA PH A, Rafinesque. Red Bats. 



* Teeth 30 ; nioUu's f if ; upper incisors small ; wings naked and 

 interfemoral membranes nearly so. {Kycticejus.) 



1. A. crepuscularis, (LeC.) Cones. Twilight Bat. 

 Ears small, wide apart; a small wart above eye; fur 



