THE FAMILIES AND GENERA OF BATS. 
223 
Number of forms. — Eight forms of Dasypterus are now known. 
Characters. — Like Lasiurus but without the small upper premolar. 
Species examined. — Dasypterus egregius (Peters), D. ega (Ger- 
vais) and its geographical forms, also D. intermedins (H. Allen) and 
D. floridanus Miller. 
Remarks. — Though very closely related to Lasiurus this genus may, 
as a matter of convenience, be regarded as distinct. 
Genus BARBASTELLA Gray. 
1821. Barbastella Gray, London Medical Repository, XV, p. 300, April 1, 
1821. 
1839. Bynotus Keyserling and Blasius, Wiegmann’s Archiv. fur Naturge- 
schichte, 5ter Jahrg., I, p. 305. 
1878. Bynotus Dobson, Catal. Chiropt. Brit. Mus., p. 175. 
1897. Barbastella Miller, Ann. and Mag. Nat. Hist., 6th ser., XX, p. 385, 
October, 1897. 
Type-species. — V espertilio barbastellus Schreber. 
Geographic distribution. — Northern Africa; central and southern 
Europe ; west central Asia to the Himalayas. 
Number of forms. — Two species are known. Barbastella barbastel- 
lus (Schreber) and B. darjelingensis (Hodgson). 
Characters. — Dental formula : 
-2 3 . 1 . - 2-4567 . 2-2 , 1-1 _ 2-2 
1 2 - 3 . 1 . - 2 - 4 5 6 7 1 3 - 3 ’ C l - 1 ’ pm 2 - 2 ’ 
3-3 .1 
m 3 ^= 34 . 
Upper incisors well developed, the inner much larger than the outer, 
its inner cusp unusually distinct and producing a noticeable length- 
ening of the crown; outer incisor nearly in contact with canine, 
its crown with acuminate anterior cusp and distinct posterior con- 
cavity directed slightly outward; lower incisors subequal, trifid, the 
outer tooth larger than either of the others, the complete row very 
convex ; upper canine simple, with distinct cingulum but no secondary 
cusps; lower canine with the cingulum produced into a noticeable 
anterior basal cusp; anterior upper premolar minute, crowded into 
angle between canine and large premolar; other cheek teeth, both 
above and below, normal ; pm 4 with inner section unusually low and 
flat, without trace of inner cusp ; m 1 and m 2 with very large proto- 
cone and no hypocone, m 3 with crown area distinctly more than half 
that of m 1 or m 2 , its metacone and three commissures well devel- 
oped; lower molars with the cusps all normal in position and size, 
though the protoconids are somewhat unusually slender and high. 
Skull with rather long, rounded brain case and weak rostrum, the 
upper surface of which is distinctly concave from edge of nares to 
faintly developed supraorbital ridges; audital bullae not specially 
enlarged; zygomata not expanded at middle. Ears broad but not 
