Banks, Greene, McAtee, and Shannon — Dist. of Col. Diptera. 189 



alanthus; Plummers Id., Md., June 14, 1908, McAtee; Great Falls, Va., 

 June 5, Banks; Four-Mile Run, Valley, Va., June 11, 1916, on Ceanothus, 

 McAtee. 



X. BicoLOR Loew.— Beltsville, Md., July 6, 1916, F. R. Cole; August 

 6, 1916, McAtee; Marlboro, Md., June 19, 1915, Shannon; Cabin John, 

 Md., May 23, 1911, P. R. Myers; Maryland opposite Plummers Id., June 

 13, 1914; Plummers Id., Md., June 20, 1916, Shannon; Dead Run, Va., 

 June 9, 1915; Great Falls, Va., June 1, 1915, Shannon ; Great Falls, Va., 

 June 25; Chain Bridge, Va., June 5, June 23, 1916; Glencarlyn, Va., 

 May 31, June 16, Banks. 



X. CHALYBEA Wiedemann. — Plummers Id., Md. , May 8, 1915; June 4, 

 1915; June 13, 1915; June 17, 1913, J. D. Hood; July 16, 1916, H. L. 

 Viereck; July 25, 1916, A. K. Fisher; July 28, 1912, McAtee; Maryland 

 near Plummers Id., May 24, 1916, J. C. Crawford; College Park, Md., 

 May 25, 1913; Dead Run, Va., May 23, 1915; May 24, 1916; June 9, 

 1915; Linneville, Md., July 5, 1913, Shannon; Falls Church, Va., June 

 21, 1914, F. Knab; Great Falls, Va., June 27, 1913, Greene; May 19, June 

 25, and July 21, Banks; Glencarlyn, Va., May 9, Banks; "Washington, 

 D. C, May 22, C. H. T. Townsend; rests on leaves in bright sunshine 

 several feet from ground, also on moist logs in sunshine. 



X. ELONGATA Williston. — Glencarlyn, Va., June 17, and July 2, Banks; 

 Beltsville, Md., July 6, 1916, F. R. Cole. 



X. EJUNCiDA Say. — Dyke, Va., May 14, F. R. Cole; Rosslyn, Va., July 

 11, 1913; Linneville, Md., July 5, 1913, Shannon; College Park, Md., 

 May 25, 1913, F. Knab; Beltsville, Md., June 18, July 4, and August 6, 

 1916; Plummers Id., Md., June 14, 1908; July 11, 1909, McAtee; July 

 24, Banks; Dead Run, Va., June 9, 1915 ; June 29, 1915, Shannon; Falls 

 Church, Va., May 23, June 2, 18, 23, 28; Odenton, Md., July 18; Glen- 

 carlyn, Va. , June 16 and July 2 ; Great Falls, Va. , July 21 ; Banks ; rests 

 on leaves. 



X. FACIALIS Coquillett.— Beltsville, Md., June 25, 1915, Shannon. 



X. FRAUDULOSA Loew. — Glen Echo and Cabin John, Md. , April 23, 1914 ; 

 Dead Run, Va., April 21 and May 9, 1916; April 21 and August 3, 1915; 

 Rosslyn, Va. , April 23, 1913, Shannon ; Great Falls, Va., April 20, 1916, 

 flowers of Amelanchier, McAtee ; Marlboro, Md. , June 19, 1915, Shannon ; 

 Beltsville, Md., July 30, 1916, flowers of Cephalanthus, McAtee. 



X. MARGiNALis Williston. — Maryland opposite Plummers Id., May 14, 

 1915, on pine log; Great Falls, Va., April 15, Banks ; April 28, 1915, on 

 dead sycamore log. Shannon. 



X. METALLiCA Wiedemann. — Falls Church, Va., June 7, Banks. In 

 general similar to X. ejuncida, but the pale femora will readily separate it, 



X. PiGRA Fabricius.— Washington, D. C, May 22, C. H. T. Townsend; 

 Falls Church, Va., July 5 and May 23. Larvae have been found under 

 dead pine bark (Greene). 



