the Families and genera 6f bats. 



87 



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. — Emballonurasemi- 

 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 gr'oup, in this respect 

 approached by Taphozous only. 



Genus COLEURA Peters. 



1867. Coleura Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 



p. 479. 

 1878. Coleura Doeson, 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). 



Fig. 12. — Emballonura peninsularis. 

 Adult male. Trong, Lower Siam. 

 No. 83556. X2J. 



