204 SUPPLEMENT. 
(N.) ANTROZOUS. 
Antrozous, H. Allen, Proc. Acad. Philad. 1862, p. 248. 
This genus differs from the rest of the family in having only four lower incisors ; and 
it is also exceptional in the possession of a rudimentary discoid nose-leaf, the only 
other Vespertilionine Bat which shares the latter peculiarity being the Old-World 
genus Wyctophilus. Only one species of Antrozous is known, a pale-yellowish-brown- 
coloured Bat, with a forearm of about two inches. 
(N.) Antrozous pallidus. 
Vespertilio pallidus, Leconte, Proc. Acad. Philad. 1855, p. 437 (descr. orig.)*; Baird, Rep. U.S. 
Mex. Bound. Surv. ii. Mamm. p. 4’. 
Antrozous pallidus, H. Allen, Mon. Bats N. Am. p. 68°; Dobson, Cat. Chir. Brit. Mus. p. 171 *. 
Hab. Nortu America, western regions, from Oregon southwards ?.—Mexico, Sonora ?. 
This peculiar Bat appears to be not uncommon in the Rocky-Mountain province, 
going as far north as Oregon (whence it has been sent to the United-States Museum by 
Dr. Suckley *), and extending southwards to Northern Mexico. ‘* Numerous specimens 
of this species,” says Professor Baird, “ were collected by the Boundary Commission in 
Texas, New Mexico, Sonora, and California. The one described by Major Leconte was 
taken at El Paso” 2. 
(N.) NYCTICEJUS. 
Nycticejus, Rafinesque, Journ. de Phys. Ixxxviil. p. 417 (1819, fide H. Allen, Mon. Bats N. Am. 
p- 11). 
Nycticejus agrees with the closely allied genus Atalapha in having only two upper 
incisors, but differs in the nakedness of its interfemoral membrane, in the form of its 
small subtriangular ear, and in the shape of its tragus, which has a straight inner 
margin instead of being curved boldly inward. NV. crepuscularis, the only known 
species *, is a small Bat, with a forearm of about 1°40; its fur is brown, tipped with 
a lighter tint. 
(N.) Nycticejus crepuscularis. 
Vespertilio crepuscularis, Leconte, M‘Murtrie’s Cuv. An. Kingd. i. p. 482 (1831, descr. orig. fide 
H. Allen), Proc. Ac. Philad. 1856, p. 433°. 
Nycticejus crepuscularis, H. Allen, Mon. Bats N. Am. p. 12°; Dobson, Cat. Chir. Brit. Mus, 
p. 266%. 
Hab. Nortn America, from New York southwards *.—Mexico, Matamoras (Berlandier, 
U.S. Nat. Mus.*). | 
* It is to be remembered that though several Old-World Bats have been referred to Wycticejus by Temminck 
and other writers, they have been generically separated by Professor Peters and Mr. Dobson under Leach’s 
name Scotophilus: cf. supra, p. 19, footnote. 
