THE FAMILIES AND GENERA OF BATS. 
215 
Genus L^PHOTIS Thomas. 
1901. Lcephotis Thomas, Ann. and Mag. Nat. Hist., Ttli ser., VII, p. 460, 
May, 1901. 
Type-species. — Lcephotis wintoni Thomas. 
Geographic distribution. — British East Africa. 
Number of forms. — Only the type species is thus far known. 
Characters. — Very similar to Histiotus , but differing in the follow- 
ing particulars: Tragus spatulate, narrowed just above middle; 
skull with less elevated braincase, its general form much as in Lasi- 
onycteris , except that rostrum is slender and not flattened ; zygomata 
longer and nearly parallel, not so abruptly bowed outward; audital 
bullae smaller than in Histiotus , rather larger than in Lasionyeteris , 
their diameter about equal to distance between them. The teeth are 
throughout as in Histiotus. 
Species examined. — Lcephotis wintoni Thomas. 
Remarks. — The very striking similarity of this African genus to 
the South American Histiotus may be the result of parallel develop- 
ment from some Eptesicus- like ancestry, but I am inclined to believe 
that it indicates a relationship much less remote. 
Genus OTONYCTERIS Peters. 
1859. Otonycteris Peters, Monatsber, k. preuss. Akad. Wissensch, Berlin, 
p. 223. 
1878. Otonycteris Dobson, Catal. Ckiropt. Brit. Mus., p. 181. 
Type-species. — Otonycteris hemprichii Peters. 
Geographic distribution. — Northern Africa and central and south- 
western Asia. 
Number of forms. — Two species of Otonycteris are now known. 
Characters. — Dental formula : 
-2-.1. d567.1-l 1-1 1-1 3-3 _ 
12 3. 1. - 2- 4567*3 - 3’ C l-T pm 2 - 2 ’ m 3 - 3~ ;30 ' 
Externally like a large Myotis , the ears proportionally larger, but 
not differing appreciably in form. Skull essentially like that of the 
larger species of Eptesicus , but deeper in interorbital region and 
slightly narrower in general outline ; interorbital region flat dorsally, 
the edge of the orbit forming a distinct angle that suggests an incipi- 
ent postorbital process; audital bullae very large, though not peculiar 
in form, their greatest diameter about three times the distance 
between them and slightly more than width of palate between last 
molars. The teeth resemble those of Eptesicus , except for the ab- 
sence of the outer incisor and for the following details in structure: 
