36 BULLETIN NO. VII. 
GENUS VESPERTILIO 
The generic term as thus restricted includes such bats as, 
having four upper and six lower incisors, have also six molars 
above and below on either side, or 38 teeth in all, thus: i. 4, 
c. 1, m. §x2—88. Wings and ears thinner than in the preced- 
ing; skull less heavy, cranial portion inflated, upper outline 
concave. 
Vespertilio subulatus Say. 
LITTLE BROWN BAT. 
Vespertilio subulatus SAY. Long’s Exped. Rocky Mts., 1832. 
HARLAN. Fauna Amer., 1825. 
RICHARDSON. Fauna Bor. Amer., 1829. 
GopMAN. Am. Nat. Hist., 1831. 
Cooper. Ann. Lyc. N. Y., 1837. 
DEKay. Nat. Hist. N. Y., 1842. 
WAGNER. Schreb., Siiug., 1855. 
LECONTE. Proc. Acad. Phila., 1855. 
H. ALLEN. Monog. Bats N. A., 1864. 
J.A. ALLEN. Cat. Mam. Mass., 1869. 
BAIRD. Mam. N.A. 
CoUES AND YARROW. Surv. 100th Mer. Zool., 1875. 
Dogson. Cat. Chir. B. M., 1878. 
Vespertilio californicus BACHMAN. Journ. Phila. Acad., 1842. 
PEALE. U.S. Expl. Exped., 1858. 
Vespertilio caroli TEMMINCK. Monogr. Mam., 1835. 
WAGNER. Schreb. Siug., 1855. 
Vespertilio domesticus GREEN. Cab. Nat. Hist. 
Vespertilio evotis H. ALLEN. Monogr. Bats N. A., 1864. 
Vespertilio lucifugus LECONTE. Cuv. An. King., 1831. 
Max V. WIED. Verzeich. Beobach. Siiug. N. A. 1860. 
H. ALLEN. Monog. N. A. Bats, 1864. 
This is our commonest species and is familar to every one. 
The body is very compact and the fur dense and soft. The 
head is mouse-like, and expression hightened by the long, 
rather acute ears. 
Color above, dark olive brown, tips of hairs being yellowish: 
below, olive gray, vared with whitish and yellowish. Lips, 
muzzle and top of nose nearly naked, vibrissee abundant, 
cheeks warty. The membranes are black, the interfemoral 
portions being slightly hairy. Ear elongated, sub acute; tra- 
gus one-half its hight. The point of the tail is exserted. 
Dentition 7. 3, c. 1, m. $x2=—88. Incisors of upper jaw in 
pairs projecting inward, small, bifid. Two anterior premolars 
minute, the second being smaller. 
