87 
THE FAMILIES AND GENERA OF BATS. 
metastyle or of fourth commissure. Third lower molar smaller than 
first or second, but with all the elements complete. Skull (fig. 12) 
very delicate and lightly built, the rostrum about half as long as 
brain case, broad and flat, with distinct though not excessive lateral 
inflation and a broad median longitudinal groove. Anterior lower 
border of orbit so expanded that toothrows are not visible from 
above. Postorbital processes very slender, extending nearly to zy- 
gomata. Basisphenoid pits broad and shallow, the median divi- 
sion barely indicated by a low ridge. Audital bulla smaller than 
combined area of pits, distinctly emarginate antero-internally. 
Mandible with angular process bent conspicuously outward. Tibia 
scarcely flattened posteriorly. Extern- 
ally characterized by the slender form 
and absence of both specially elongated 
muzzle and deep depression between 
eyes. Like all of the Old World mem- 
bers of the family, Emballonura lacks 
unusual glandular development in the 
wings. 
Species examined. — Emballonura semi- 
caudata (Peale), E. peninsularis Miller, 
E. anambensis Miller, and E. nigre - 
scens (Gray). 
Remarks. — In the presence of 2 - 2 up- 
per incisors, in the slight flattening of 
the tibia and in the special modifica- 
tions that distinguish most of the other 
genera, Emballonura is the most primi- 
tive member of the family. It is also 
the most widely distributed genus in the group, in this respect 
approached by Taphozous only. 
Fig. 12.— Emballonura peninsularis. 
Adult male. Trong, Lower Siam. 
No. 83556. X2L 
Genus COLEURA Peters. 
1867. Coleura Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 
p. 479. 
1878. Coleura Dobson, Catal. Chiropt. Brit. Mus., p. 364. 
Type-species. — Emballonura afra Peters. 
Geographic distribution. — Eastern Africa from Mozambique to 
upper Egypt ; Seychelle Islands. 
Number of forms. — Only two members of this genus have been de- 
scribed. 
Characters. — Like Emballonura , but upper incisors only 1 — 1 ; pre- 
maxillary strongly bent inward above; basisphenoid pits coalesced, 
very deep posteriorly, where they are margined by a conspicuous 
overhanging edge. 
Species examined. — Coleura afra (Peters). 
