THE FAMILIES AND GENERA OF BATS. 
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Genus SCOTCECUS Thomas. 
1901. Scotcecus Thomas, Ann. and Mag. Nat. Hist., 7th sei\, VII, p. 263, 
March, 1901. 
Type-species. — Scotophilus albofuscus Thomas. 
Geographic distribution. — Africa, except northern portion. 
Number of forms. — Scotoecus albofuscus (Thomas), S. hindei 
Thomas, S. hirundo (de Winton). 
Characters. — -Externally like Nycticeius. Skull as in Nycticeius , 
but everywhere greatly broadened, the zygomatic breadth at least 
equal to basal length in median line; lachrymal region so wide that 
diameter of skull at front of orbits is considerably greater than that 
across outer edge of toothrows. Teeth as in Nycticeius. 
Species examined. — I have examined all of the known species. 
Remarks. — The great broadening of the skull, especially in the 
lachrymal region, combined with the perfectly Nycticeius- like teeth 
distinguish this genus from its allies. 
Genus SCOTEINUS Dobson. 
1875. Scoteinus Dobson, Proc. Zool. Soe. London, p. 371 (subgenus of 
Scotophilus) . 
1878. Scoteinus Dobson, Catal. Chiropt. Brit. Mus., p. 257 (subgenus of 
Scotophilus) . 
Type-species. — Scotophilus emarginatus Dobson. 
Geographic distribution. — This genus is at present known from 
Africa, India, and Australia. 
Number of forms. — Scoteinus balstoni Thomas, S. emarginatus 
(Dobson), S. greyii (Gray), S. pallidus (Dobson), and S.. schliefenii 
(Peters). 
Characters. — Externally like Nycticeius. Skull as in Nycticeius , 
but broader, though without the conspicuous widening in lachrymal 
region characteristic of Scotoecus. Teeth differing from those of 
both Nycticeius and Scotoecus in the reduction of the posterior por- 
tion of last molar both above and below ; in m 3 both mesost}de and 
metacone are practically absent, though the position of each is indi- 
cated in the very short commissure back of protocone ; m 3 with 
scarcely a trace of entoconid, and with second triangle very much 
smaller than first. 
Species examined. — Scoteinus balstoni Thomas, S. greyii (Gray) 
and S. schliefenii (Peters). 
Genus SCOTOMANES Dobson. 
1875. Scotomanes Dobson, Proc. Zool. Soc. London, p. 371 (subgenus of 
Scotophilus ) . 
1878. Scotomanes Dobson, Catal. Chiropt. Brit. Mus., p. 258 (subgenus of 
Scotophilus ) . 
Type-species. — Ny dice jus ornatus Blyth. 
