VESPEETILIONID^. — CXO . 331 



565. LASIONYCTERIS Peters. (\a<nos, woolly ; wKvepis, 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 J. E. 12. 

 T. 1|. U. S. generally, migrating south in winter ; easily known 

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



566. PIPISTRELLTTS Kaup. (Italian pipisirello, vispitrello, 

 dim. of vespertilio. bat.) 



1092. P. subflavus (F. Cnvier). 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. obsourus Miller. Color duller, less yellow. Lake George,. 

 N. Y. 



567. VESPERTILIO Linna:us. (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. IJ. 

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

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



568. NYCTICEIUS Rafinesque. (to'|, 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. 3i. E. 9. 

 T. 1^. Penn. to Mo. and S. W., common. 



569. LASITTRUS Gray. (Xdo-ior, woolly ; oipa, tail.) 



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

 reddish brown, mostly white at tip ; lips and ears not edged with 

 black; a whitish tuft at base of thumb. L. 3f. E. 12. T. 1|. 

 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, (xopwij, club; piv, 



nose.) 



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

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



