VESPERTILIONIDA. — CXC. 331 
565. LASIONYCTERIS Peters. (Adovos, woolly ; vuxrepis, bat; 
night-watcher. ) 
1091. L. noctivagans (Le Conte). SimvEer Brack Bar. 
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}. HE. 12. 
T. 13. U.S. generally, migrating south in winter; easily known 
by its color. (Lat., nox, night; vagans, wandering.) 
566. PIPISTRELLUS Kaup. (Italian pipistrello, vispitrello, 
dith. 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. 13. N.Y. to Iowa and Texas; chiefly southward. 
Subspec. obscurus Miller. Color duller, less yellow. Lake George, 
N. Y. 
567. VESPERTILIO Linnzus. (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. 1}. 
Is rather smaller than the European V. serotinus. Me. to B. C., 
S. to Ariz., common. (Lat., dusky.) 
568. NYCTICHIUS Rafinesque. (wé, night.) 
1094. N. humeralis Rafinesque. Twiticut Bart. “Ears small, 
wide apart; a small wart above eye; fur rather scanty. Dark 
fawn color above, passing into brownish below. L. 3}. E. 9, 
T. 14. Penn. to Mo. and S. W., common. 
569. LASIURUS Gray. (Adctos, woolly ; ovdpd, tail.) 
1095. L. borealis (Miiller). Rep 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. 33. E. 12. T. 14. 
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. JT. 23. U.S., rather northward, mi- 
grating south in winter, rare. (Lat., ashy.) 
570. CORYNORHINUS Harrison Allen. (kopiv, club; fiv, 
nose. ) 
1096. C. macrotis (Le Conte). Bic-rarEep Bat. Known 
by its large size and very large ears. Blackish; fur soft and 
