PROC. ENT. soc. WASH.. VOL. 22, NO. 2, FEB., 1920 31 



A. lecythus Walker. Common ; May 25 to August '22 ; in cop- 

 ula latter date. V. P. I. 



A. maneei Hine. Great Falls, Va., June 29, 1915, C. T. 

 Greene; July 20, 1913, F. Knab; September 24, Banks; Glen- 

 can yn, Va., June 23, 1914, W. D. Appel; Washington, D. C., 

 September 22, 1915; Beltsville, Md., September 10, 1916, McAtee. 



A. notatus Wiedemann. The most abundant species of the 

 genus. Extreme dates of collection May 21 to September 20; 

 in copula various dates from May 31 to September 19. Has 

 been found preying upon the following: moths; the leaf -hopper, 

 Draeculacephala mollipes; Tabanus costalis, and another small 

 horsefy; the cranefly, Nephrotoma ferruginea; and a chrysomelid 

 beetle. P. I. 



A. novaescotiae Macquait. Next in abundance to last species; 

 season: June 14 to September 24; in copula August 11, 16, 20, 

 22. P. I. 



A. paropus Walker. Great Falls, Va., June 28, 1917, August 

 17, 1916, C. T. Greene; July 22, August 13; Chain Bridge, Va., 

 June 9; Falls Church, Va., July 7 and 9, Banks; July 13, 1913, 

 F. Knab; Lakeland, Md., July 14, 1916, McAtee; Riverdale, Md., 

 June, 1916; Bladensburg, Md., June 13, 1916; Beltsville, Md., 

 June 14, 1916, F. R. Cole. Has been found preying upon the 

 cranefly, Epiphragma solatrix and the Dexiid, Cordyligaster min- 

 iuscula. 



A. sadyates Walker. Common; July 10 to October 28. P. I. 



A. s?riceus Say. Fairly common; May 31 to July 25; prey 

 observed includes . Libellulid and the beefly, Bombylius mex- 

 icanus. 



A. snowii Hine. Great Falls, Va., August 13, 17, Banks; 

 Plummers Island, Md., June 11, 16, 1912, E- A. Schwarz and H. 

 S. Barber; June 15, 191 1", P. R. Myers; July 4, 1907, A. K. Fisher; 

 July 4, 1914, little Falls, D. C., August 22, 1915 (common and in 

 copula), McAtee; Woodridge, D. C., August 29, 1915, F. Fritz; 

 Beltsville, Md., September 3, 1916, McAtee. 



* 



Asilus virginicus Banks, new species. 



In general similar to A. notatus, but differs in having a more slender and 

 elongate superior forceps, the tip of which is not bent downward (see Fig- 

 ures 1 and 2). Black; legs black, bases of tibiae reddish, mystax half black, 

 pale below; antennae and palpi black and black-haired; abdomen rather 

 more black above than A notatus, apical margins and sides of segments yel- 

 lowish gray pruinose. Arista of antenna a little shorter than the third joint; 

 male genitalia from above narrower than the abdomen, tapering behind, the 

 superior forceps long, nearly straight and not decurved at tip, and with 

 white hair beneath as in A . notatus. 



