202 PROC. ENT. SOC. WASH., VOL. 20, NO. 9, DEC., 1918 



the trees in front of the house. Sometimes they remained sta- 

 tionary, again they shifted position rapidly; their most unusual 

 feat, however, was darting over the roof of the cabin and back 

 through the 2 open doors or vice-versa. So swiftly was this done 

 that a fly would scarcely be missed from its place before it was 

 back again. This behavior was seen during only a few days in 

 late summer 1907, and has not again been observed. The Belts- 

 ville specimens found by McAtee were sitting on the road. 



T. americanus Forster. Laurel, Md., July 17, 1914, E. B. 

 Marshall; Beltsville, Md., July 30, 1916, Walton. A specimen 

 seen mashed on a porch floor at Dunn-Loring, Va., August 30, 

 1916, McAtee. 



T. astutus Osten Sacken. Beltsville, Md., June 18, 1916, 

 McAtee; Chain Bridge, D. C., September 7, 1913, C. T. Greene. 



T. atratus Fabricius Beltsville, Md., June 23, 1909, McAtee; 

 July 14, 1916, F. R. Cole; Ocober 1, 1916, McAtee; Woodridge, 

 D. C., August 29, 1915, E. R. Kalmbach; Washington, D. C., June 

 11, Wm. Palmer; Corner Conduit and Potomac Roads, Md., 

 June 29, 1913, McAtee; Plummers Island, Md., June 9, 1914, 

 R. C. Shannon; Falls Church, Va., August 22, 1917, C. T. Greene; 

 A species more often seen than captured; a male was seen at a 

 mud puddle in road, at Mt. Vernon, Va., August 20, 1916, McAtee. 



T. bicolor. Wiedemann. Washington, D. C., July 7, 1899, 

 J. S. Hine; another specimen without date, M. L. Linell. 



T. carolinensis Macquart. Common; season May 9 (male, 

 first female May 28) to July 18. (P. I.) 



T. cinctus Fabricius. Beltsville, Md., July 4, 1916, Walton; 

 Laurel, Md., July 17, 1914, E. B. Marshall. 



T. coffeatus Macquart. Odenton, Md., July 4, 1913; Belts- 

 ville, Md., July 4, 1916, McAtee; July 6, 1916, (including 1 

 male), F. R. Cole, C. T. Greene ; August 6, 1916, McAtee; Hyatts- 

 ville, Md., male, June 19, 1915, B. P. Currie; Bladensburg, Md., 

 July 17, 1916, R. C. Shannon; Maryland near Plummers Island, 

 July 27 and August 22, 1916, McAtee; Great Falls, Va., June 5, 

 Nathan Banks. 



T. costalis Wiedemann. Beltsville, Md., July 10, 1909, 

 Branch ville to Beltsville, Md., June 4, 1914, McAtee; Linnie- 

 ville, Md., July 5, 1913, R. C. Shannon; Maryland near Plum- 

 mers Island, July 11, 1909, July 27, 1916, McAtee; Washington, 

 D. C., June 18, 1897, July 3 and 7, 1899, J. S. Hine; Maywood, 

 Va., July 16, 1916, McAtee; Falls Church, Va., June 20, July 4, 

 25 (male) and 28, and August 5, male at honeydew on tulip tree, 

 Nathan Banks; July 3, 1916; on Ceanothus, June 24, 1916, C. T. 

 Greene. 



Atylotus baal Townsend (see bibliography) is related to cos- 

 talis or fulvulus, but its exact identity cannot be made out 

 except by study of the type. 



