84 Miller Twelve New Genera of Bats. 



Macroderma gen. nov. (Megndermidse). 



Type. Megaderma gigas Dobson. 



Characters. Differing from Megaderma and Lyroderma in the absence of 

 the small upper premolar (pm 1 ), in the peculiar character of the interorbital 

 expansion, the development of which is intermediate between that in the 

 Asiatic and African members of the group, and in the much greater devel 

 opment of the cartilaginous premaxillaries. 



Species. Macroderma gigas (Dobson). 



Ardops gen. nov. (Phylloslomidss). 



Type. Stenoderma nichollsi Thomas. 



Characters. Like Stenoderma but rostrum not depressed between supra- 

 orbital ridges ; anterior nares directed chiefly forward; incisive framina 

 not separated by any appreciable space from roots of incisors ; supraorbital 

 ridges angled at middle; inner upper incisor with length of crown nearly 

 equal to height ; and m 1 and in- without metaconule. 



Species. Ardops nichollsi (Thomas), A. montserralensis (Thomas), and A. 

 Incise (Miller). 



Erophylla gen. nov. (Phyllostomidx). 



Type. Phyllonycteris bombifrons Miller. 



Characters. Like Phyllonycteris but interfemoral membrane extending 

 to short though evident calcar ; noseleaf with pointed median projection ; 

 zygomatic arches complete; and lower molars with distinct cutting edge. 



Species. Erophylla bombifrons (Miller), E. planifrom (Miller), E. sezekorni 

 (Gundlach) and E. santacristobalensis (Elliot). 



Duemus gen. nov. (Desmodontidx). 



Type. Desmodus youngi Jentink.* 



Characters. Like Desmodus, but thumb only about one-eighth as long as 

 third finger, the two pads on its under surface coalesced ; inner lower in 

 cisor trilobate, with large median lobe, a minute inner lobe near tip and 

 an equally small outer lobe near base. 



Species. Dizemus youngi (Jentink). 



Dirias gen. nov. (Noctilionidse}. 



Type. Noctilio albiventer Spix. 



Characters. Like Noctilio but with leg and foot less elongated (equal to 

 about 40 per cent of total length) ; m 1 and m^ with very large hypocone 

 connected by a high conspicuous commissure with commissure extending 

 from protocone to metacone. 



Species. Dirias albiventer (Spix). 



* As represented by a specimen from Roca Nova, Parana, Brazil (No. 140,769, U. S. 

 National Museum ; A. Robert, collector). 



