192 Proceedings of the Biological Society of Washington. 



Sphecoinyia Latreille. 



S. virrATA Wiedemann. — Plumniers Id., Md., May 9, 1915, specimen 

 seen flying around bases of trees, Shannon; Maryland near Plummers 

 Id., May 6, 1914, in copula, H. Weld; May 21, 1916, H. L. Viereck ; 

 Cabin John, Md., April 29, 1916, Shannon; Washington, D. C, April 23, 

 1909, F. Knab; Falls Church, Va., June 22, 1907, April 22, 1913, and 

 May 2, 1914, on blossoms of Viburnum, Greene; Great Falls, Va. , May 

 10, 1915, Mt. Vernon, Va., May 7, 1916, on flowers of Amelanchier, 

 L. O. Jackson. 



Temnostoma St. Fargeau and Serville. 



T. BOMBYLANs Fabricius.— Beltsville, Md., May 28 and June 18, 1916, 

 McAtee; Plummers Id., Md., June 7 and 20, H. 8. Barber; June 7, 14, 

 15, and July 7, 1908, McAtee; Maryland near Plummers Id., May 21, 

 1916, H. L. Viereck ; Virginia near Plummers Id., April 18. 1913, bred 

 from hickory log, H. S. Barber; June 2, 1916, MciVtee; Dead Run, Va., 

 May 14 and June 28, issuing from rotten maple log, May 9, 24, and June 

 20, 1916, Shannon; Washington, D. C. , D. H. demons; Rosslyn, Va. , 

 May 4, 1913, from rotten willow log, Shannon ; May 11, 1913, under bark 

 of willow log; Falls Church, Va. , June 21, 1914, F. Knab; Glencarlyn, 

 Va., May 18; Dead Run, Va., June 23 ; Falls Church, Va. , May 3, Banks. 

 This species breeds in logs generally in low damp places. It flies with its 

 black fore tarsi extending straight out and while hovering in this position 

 it has a great resemblance to a wasp (Shannon). 



T. ExcENTRicuM Harris. — Cabin John Run, Md., June 29, 1916, F. R. 

 Cole; Plummers Id., Md., June 4 and July 6, 1915, Shannon; June 11, 

 1916, H, L. Viereck ; Dead Run, Va., May 23 and June 20, 1915, May 10 

 and 21, 1916, reared from elm log, June 20, 1916, Shannon; June 23, at 

 rotten log in partial shade. Banks; Falls Church, Va., May 26, 1913, 

 resting on grass at base of tulip tree, Greene. This species has habits 

 very similar to those of T. bombylans. It should be pointed out that the 

 length (6 mm.) given for this species by Williston is erroneous. In the 

 original description (Insects Injurious to Vegetation, Ed. of 1862, p. 609) 

 Harris gives from j% to j% inch. 



T. PiCTULA Williston.— Plummers Id., July 20, 1912, H. S. Barber; 

 May 19, 1916, June 18, 1914, Shannon; Washington, D. C, May 17, 1908, 

 H. O. Marsh. 



Ceria Fabricius. 



C. ABBREViATA Loew. — Falls Church, Va. , May 22, from larva on oak 

 bark. Banks. 



C. wiLLisTONi Kahl. — Plummers Id., Md. , May 8, 1915, J. C. Crawford; 

 Falls Church, Va., May 18, 1913 ; April 27, 1915 ; Great Falls, Va., April 

 28, 1915; resting on maple trunk, on leaves of May apple, in sun; also 

 fliying close to ground, Greene ; Falls Church, Va. , March 27, from pupa 

 on oak bark, Banks. 



