THE FAMILIES AND GENERA OF BATS. 
105 
Genus MACRODERMA Miller. 
1906. Macroderma Miller, Proc. Biol. Soc. Washington, XIX, p. 84, June 4, 
1906. 
1907. Macrodermd Andersen and Wroughton, Ann. Mag. Nat. Hist., 7th 
series, XIX, p. 187, February, 1907. 
Type-species. — Megaderma gigas Dobson. 
Geographic distribution. — Australia (Queensland). 
Number of forms. — The type species is the only form of Macro- 
derma yet known. 
Characters. — General form of skull much as in Lyroderma , but 
postorbital and antorbital processes more prominent, hamular region 
deeply concave internally as in Megaderma , and interpterygoid space 
extending forward to level of posterior border of second molar. 
Teeth more extremely modified than those of Lyroderma. The very 
small paracone and well -developed metacone separated from outer 
border of molars by a conspicuous nearly horizontal area. Small 
upper premolar absent. 
Species examined. — Macroderma gigas Dobson (specimen from 
from Central Australia, No. 92, 5, 20, 2, Brit. Mus., and photograph 
of skull of type, kindly furnished by Professor Ehlers). 
Remarks. — Macroderma represents the extreme phase of the pecul- 
iar tendency of molar development characteristic of the group. 
Genus LAVIA Gray. 
1838. Lavia Gray, Mag. Zool. and Bot., II, p. 490. 
1846. Livia Agassiz, Nomenclator Zoologicus, Addenda, p. 6. 
1878. Lavia Dobson, Catal. Ghiropt. Brit. Mus., p. 155 (subgenus of Mega- 
derma). 
1905. Lavia Miller, Proc. Biol. Soc. Washington, XVIII, p. 227, December 
9, 1905 (genus). 
1907. Lavia Andersen and Wroughton, Ann. Mag. Nat. Hist., 7th series, 
XIX, p. 138, February, 1907. 
Type-species. — Megaderma frons Geoffroy. 
Geographic distribution. — Tropical Africa. 
Number of forms. — The genus is represented by two forms. 
Characters. — Like Megaderma , but lacking the minute upper pre- 
molar ( pm 3 ) frontal region of skull widely expanded and with con- 
spicuous postorbital processes ; basisphenoid pits obsolete ; upper mo- 
lars with well-developed mesostyles and normal W pattern; lower 
molars with outer and inner % cusps not unusually close together, 
those on lingual side well developed, though m 3 is without distinct 
entoconid. 
Species examined. — Lavia frons (Geoffroy) and Lavia rex (Miller). 
