THE FAMILIES AND GENERA OF BATS. 
253 
in form, sometimes low and indistinct. Muzzle pad well developed 
and sharply outlined, its upper margin thickly set with horny points 
like those on. anterior margin of ear; a line of similar points extends 
downward across middle of pad between nostrils. Upper lip full and 
wrinkled, rather thickly sprinkled, as are also the muzzle and chin, 
with stiffened spoon-hairs, the extremities of which are very slightly 
expanded. Feet as usual in the family. 
Species examined. — All of the American forms ( Nyctinomus and 
“ Nyctinomops ”) , also N. cegyptiacus Geoffroy, N. africanus Dobson, 
N. anchietee Seabra, N. bocagei Seabra, N. brachypterus Peters, N. 
brunneus Seabra, N. cisturus Thomas, N. lobatus Thomas, N. lorice 
Thomas N. mops (F. Cuvier), 
N . norfolcensis Gray, N. ther- ■ 
sites Thomas, N. tragatus Dob- 
son. 
Remarks . — The genus Nycti- 
nomus is the most widely dis- 
tributed group of Molossine 
bats. Its members also present 
more variations in form than in 
perhaps any other genus of the 
entire order. So great are 
these differences that it seems 
probable that the genus must 
be subdivided into several 
groups of at least subgeneric 
rank. For the present, how- 
. ever, I seemo better course than 
to unite all of the species with 
2-2 upper premolars under the 
name Nyctinomus. The Amer- 
ican forms, as I have already 
pointed out, fall naturally into two groups, but the distinctions 
between them become apparently worthless when the Old World spe- 
cies are considered. Nyctinomus is readily distinguishable from 
other genera of the family, though the superficial resemblance to 
some species of Eumops is occasionally deceptive, while that to 
Chcerephon and Mormopterus is even more striking. The technical 
characters are, however, sufficiently distinct. 
Genus MORMOPTERUS Peters. 
1865. Mormopterus Peters, Monatsber. k. preuss. Akad. Wissenscb., Berlin, 
p. 258 (subgenus of Nyctinomus). 
1878. Mormopterus Dobson, Catal. Chiropt. Brit. Mus., p. 440 (subgenus of 
Nyctinomus) . 
Type- species. — Nyctinomus jugularis Peters. 
Fig. 43. — Nyctinomus macrotis. Jamaica. No. 
3914, Miller Coll, x about 2 \. 
