VESPBRTILIONID^. — ^VH. 23 



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

 ears large, oval, twice the Jieight 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. ( V. lucifugics, Le C.) 

 ** Teeth 36; molars -f if. {Vesper ides.) 



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

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

 femoral menibrane entirely though scantily furred; fur 

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

 hairs. L. 3^; E. 13; T. 1^. U. S. generally. 



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

 more leathery ears. {Vespenigo.) 



3. V. 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 33; molars fl-f; stout species. {Vesperua.) 



4. /. fuscus, Beauv. CAEOLiiirA 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- carolinemis, Geoff. St. 

 Hilaire.) 



2. ATALAPHA, Rafinesque. Red Ba*s. 



* Teeth 30; molars f:f; upper incisors small; wings naked and 

 interfemoral membranes nearly so. {Nycticejus) 

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

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



