Vol. XIX pp. 83-86 June 4, 1906 PROCEEDINGS OK THE BIOLOGICAL SOCIETY OF WASHINGTON TWELVE NEW GENERA OF BATS. BY GERRIT S. MILLER, Jr. By permission of the Secretary of the Smithsonian Institution Having recently examincfl some of the more important Eu- ropean collections of Chiroptem in connection Avith the material in the United States National Museum, I find that the following genera have not hitherto been described. Niadius gen. nov. {Pteropidse). — Tijpe. Cjino/ilcrus privc('j>s M'lWer. Cluiracters.—Like Cynopterus bat with the larger cheek-teeth broader and more squarish in outline crown of pm j and niy with distinct terete; cusp slightly in front of middle of crushing surface.— Species. Niadius princeps Miller ) .( Remarks.—In the increased size of the larger cheek-teeth this genus ap- proaches Thoopterus ; but the terete cusp in pm^jandm f differs conspicuously from the ridge which occupies somewhat the same position in the related group, Sphserias gen. nov. {Pteropidse). — Type. Cynopterus hlanfordl Thomas. Characters.—Like Cynopterus but without calcar and external tail; inci- sors more developed than in any of the related genera, the series of the lower jaw forming four conspicuous serrations when viewed from in front, those of the u]iper jaw with sharp-edged crown well differentiated from shaft and provided with a large main cusp near middle.— Species. Sphserias blanfordi (Thomas). Remarks.—This genus was included in Thoopterus by Matschie * but it is readily distinguishaljle by the small (normal) cheek-teeth, the absence of the calcar and external tail, and the very peculiar, trenchant form of the incisors. *Flederm. des Berl. Mus. fur Naturk., p. 77, 1899. 18—Proc. Biol. Soc. Wash., Vol. XIX,-1906. (83) 84 Miller—Twelve Neiv Genera of Bats. Macroderma gen. iiov. {Megadermidse). — Type. Megaiierma gigax Dobson. Cfiaracters.—DiSering from Mer/ddeniia and Li/nnhrina in the al)sence of the small ui)per premolar (pm^), in tlie peculiar character of the interorbital expansion, the development of which is intermediate between that iii 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. [Phiiliodouiidx). — Type. Slenoderma nichoUsi Thomas. Characters.—Like Slenoderma but rostrum not depressed between supra- orbital ridges; anterior nares directed chiefly forward; incisive framina not separated by any appreciable space from roots of incdsors ; supraorbital ridges angled at middle inner upper incisor with; length of crown nearly equal to height; and m'- and m- without metaconule.— Species. Ardops nichoUsl (Thomas), A. m