VESPERTILIONID^. — CXC. 331 



565. LASIONYCTERIS Peters. (Kda-tos, woolly ; vvKrtpls, bat ; 

 night- watcher.) 



1091. L. noctivagans (Le Conte). 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, migrating south in winter; easily known 

 by its color. (Lat., nox, night; vagans, wandering.) 



566. PIPISTRELLUS Kaup. (Italian pipistrello, vispitrello, 

 dim. of vespertilio, bat.) 



1092. P. subflavus (F. Cuvier). Tragus slender, erect, half the 

 height of the ear; upper incisors about equal in size; femoral 

 membrane one-third furred; yellowish brown, brighter forwards. 

 L. 3. E. 9. T. Ij. N. Y. to Iowa and Texas; chiefly southward. 

 Subspec. obscurus Miller. Color duller, less yellow. Lake George, 

 N. Y. 



567. VESPERTILIO Linnaeus. (Lat., bat, from vesper, 

 evening. ) 



1093. V. fuscus Beauvois. Brown Bat. Tragus never 

 pointed, nearly half as high as ear ; wings naked ; interfemoral 

 membrane furred at base ; ear more or less turned outward ; upper 

 lateral incisors small, scarcely visible. L. 3 to 4. E. 12. T. \\. 

 Is rather smaller than the European V. serotinus. Me. to B. C, 

 S. to Ariz., common. (Lat., dusky.) 



568. NYCTICEIUS Rafinesque. (vv^, night.) 



1094. N. bumeralis Rafinesque. Twilight Bat. Ears small, 

 wide apart; a small wart above eye; fur rather scanty. Dark 

 fawn color above, passing into brownish below. L. 3J. E. 9. 

 T. Ij. Penn. to Mo. and S. W., common. 



569. LASIURUS Gray. (Kdaios, woolly; ovpd, tail.) 



1095. L. borealis (Miiller) Red Bat. Fur long and silky, 

 red<lish brown, mostly white at tip ; lips and ears not edged with 

 black; a whitish tuft at base of thumb. L. 3|. E. 12. T. If. 

 E. U. S. everywhere, very abundant ; known by its reddish color. 



1095 b. L. cinereus (Beauvois). Hoary Bat. Much larger. 

 Rich chocolate-brown, overlaid with white ; lips and ears marked 

 with black. L. 5. E. 14. T. 2^. U. S., rather northward, mi- 

 grating south in winter, rare. (Lat., ashy.) 



570. CORYNORHINUS Harrison Allen. (Kopvprj, club; piv, 



nose.) 



1096. C. macrotis (Le Conte). Big-eared Bat. Known 

 by its large size and very large ears. Blackish; fur soft and 



