32 



PROC. ENT. SOC. WASH., VOL. 22, NO. 2, FEB., 1920 



Holotype, a male from Great Falls, Va., June 16, Banks (No. 

 10652, Museum of Comparative Zoology, Cambridge, Mass.). 



From Great Falls, Falls Church, Chain Bridge, Va., May 28 

 to June 16, Banks; Falls Church, Va., June 21, 1914, F. Knab; 

 Cupid's Bower Island, Va., May 31, 1915, R. C. Shannon; Branch- 

 ville to Beltsville, Md., June 4, 1914, L. O. Jackson; Beltsville, 



Explanations of figures: Fig. 1. Male 

 genitalia of A situs iiirgimcus; Fig. 2. Male 

 genitalia of Asilus notatus; both seen from side. 



Md., July 9, 1916, McAtee; Plummers Island, Md., June 30, 

 1907, A. K. Fisher; Maryland near Plummers Island, May 29, 

 1910; Virginia near Plummers Island, Md., July 20, 1913, McAtee. 



BIBLIOGRAPHY. 

 Back, E. A. 



The robber-flies of America, north of Mexico, belonging to the subfamilies 

 Leptogastrinae and Dasypogoninae. 



Trans. Am. Ent. Soc., 35, pp. 137-400, Pis. II-XII, April-October, 1909. 



Records 9 species from the District of Columbia and vicinity. 

 Banks, N. 



Captures of Diptera. 



Ent. News, 18, No. 10. Dec., 1907, p. 450. 



Dizonias tristis, Washington, D. C., June 21; later found to be Pogonosoma. 



At the Ceanothus in Virginia. 



Ent. News, 23, No. 3, March, 1912, p. 102-110. 



Names 7 species of Asilidae caught on flowers of this plant at Falls Church, 

 Va. 



Notes on Asilidae with two new species. 



Psyche, 21, No. 4, August, 1914, pp. 131-133. 



Describes Asilus autumnalis and Leptogaster loewii new species from the Dis- 

 trict of Columbia region. 



Asilids catching hymenoptera. 



Proc. Ent. Soc. Wash, 15, No. 1, April, 1913, p. 51. 



Observations at Falls Church of Deromyia preying upon Vespa and honey 

 bee, and Mallophora dausicella upon Epeolus. 



Synopsis of the genus Dasyllis (Asilidae). 



Bui. Brooklyn Ent. Soc. 12, No. 3, July, 1917, pp. 52-55. 



Describes D. virginica new species, from nearby localities in Virginia. 



