Banks, Greene, McAtee, and Shannon — Dist. of Col. Diptera. 191 



B. PICTIPES Bigot.— Dead Run, Va., May 19, 1916, May 23, 1915, 

 Shannon; Chain Bridge, Va., May 23 and 29, rests on leaves in partial 

 shade of open woods. Banks; Beltsville, Md. , April 30, 1916, flowers of 

 Aronia arbutifolia, McAtee. 



B. UMBRATiLis Williston.— Falls Church, Va., April 22, 1913; April 23, 

 1913, on flowers of Viburnum, Greene; Chain Bridge, Va., May 21, fly- 

 ing among plants about two feet from ground, Banks; Mt. Vernon, Va., 

 May 7, 1916, flowers of Amelanchier, L. O. Jackson; pupae have been 

 found in pocket in a sycamore, Greene. 



Somula Macquart. 



S. DECORA Macquart. — Washington, D. C. , Walton; Plummers Id., 

 Md., June 4, 1915, May 23, 1914, H. S. Barber; May 5, 1913, Shannon; 

 Maryland near Plummers Id., May 21, 1916, H. L. Viereck; May 23 and 

 June 9, 1915; Virginia near Plummers Id., June 2, 1916, McAtee, June 

 4, 1916, H. L. Viereck; Dead Run, Va., May, June and July, 1915, 

 1916; common in Sphagnum swamp. Shannon; Rosslyn, Va. , May 11, 

 1913, F. Knab; Falls Church, Va., April 22 to May 29, 1913; June 6, 

 1913; Chain Bridge, Va., June 23, 1915, Greene; Falls Church, Va., May 

 25 and 30; Dyke, Va., May 14; Great Falls, Va., May 19 and 25; Chain 

 Bridge, Va., May 28; Glencarlyn, Va., May 10, Banks. Sometimes taken 

 at large trees which have some loose bark ; also resting on leaves in sunny 

 places. Larvae of rat-tail type have been found in pocket of living tulip 

 tree (Greene). 



Milesia Latreille. 



M. viRGiNiENSis Drury. — Common, June 4 to October 9 ; in copula Plum- 

 mers Id., Md. , August 4, 1907, A. K. Fisher. Often seen about Ceanothus, 

 Rhus and other shrubs when in bloom, but not actually upon the flowers. 



Spilomyia Meigen. 



S. FUSCA Loew. — In the Osten Sacken collection at Cambridge there is 

 a specimen labeled District of Columbia (McAtee). 



S. HAMiFERA Locw. — Washington, D. C, July 1, F. C. Pratt; Belts- 

 ville, Md., on flowers of Sambucus, July 4, 1916, McAtee; Maryland near 

 Plummers Id., June 20, 1916, Shannon; June 26, 1902, H. S. Barber; 

 Dead Run, Va., June 29, 1915, Shannon; Plummers Id., Md., July 5, 

 1909, McAtee; Falls Church, Va., June 26, 1913, on leaves of maple in 

 shade; also on low flowers, Greene; July 16; Great Falls, Va., June 27, 

 July 21, 1916, in copula, Banks. 



S. LONGicoRNis Loew. — Beltsville, Md. , September 12, 1915, L. O. Jack- 

 son ; Bladensburg, Md., September 23, 1915, Shannon; Dixie Landing, 

 Va., October 5, C. H. T. Townsend ; Falls Church, Va., July 27, 1912, 

 Greene; June 23, September 1 and 7, July 24, August 22, September 18; 

 Glencarlyn, Va., July 2; Great Falls, Va. , June 27, September 28, and 

 October 3, Banks. Rests often on flowers of golden rod, sometimes in 

 partial shade. 



