84 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



the intermediate always, with a pair of strong median marginal 

 macrochaetae, fourth with a marginal row. Wing with one or two 

 strong costal spines; third vein .bristly at least half way to small 

 cross vein. 



Length 3.5 to 6.0 mm. 



These notes are based on the study of the following material: A 

 long series of both sexes in the National Museum, including one 

 European specimen determined by Kertesz; one male from Algon- 

 qum, Illinois, type for (nasoni) ; one from Lafayette, Indiana, two 

 from Mandan, North Dakota, two from Bottineau, North Dakota, 

 one from Boise and another from Lewiston, Idaho (J. M. Aldrich) ; 

 three from Beach, North Dakota, labeled ''taken from sunflower, 

 Webster No. 23302" (C. N. Ainslie) ; one from South Dakota; 

 three from Colorado (Coquillett) ; one from Wild Horse Canyon, 

 Animas Mountains, New Mexico, 5,000 feet; one from Soroco, New 

 Mexico (Williston); two from Koehler, New Mexico, Webster 

 No. 7707 (W. R. Walton); one from Ormsby County, Nevada 

 (Baker) ; two from Kaslo, British Columbia (A. N. Caudell) ; Wau- 

 bamic. Parry Sound, Ontario. In the Museum of Comparative 

 Zoology at Cambridge, Massachusetts; one female from Hungary, 

 determined by Prof. Karl Sajo, and specimens from Milwaukee, 

 Wisconsin (G. Graenicher), and Massachusetts (H. E. Smith). 



Range. — Massachusetts, Indiana, Illinois, Wisconsin, North 

 Dakota, South Dakota, Colorado, New Mexico, Texas, California, 

 Nevada, Utah, Idaho, Oregon, British Columbia, and Ontario. It 

 is also, according to Bezzi and Stein, widely distributed over Europe. 



Host relationships. — -Reared from grasshopper by C. N. Ainslie at 

 Payson, Utah.*^ This is an unusual record for a Miltogramminid. 

 It is questionable whether this fly will prove to be normally parasitic 

 on the active stages of grasshoppers or other herbaceous insects. 



Reinhard *" has noted the species as being persistently present in 

 Texas during May, June, and July. Several specimens were taken 

 in the insectary and others from sweeping grass and foliage near the 

 ground. 



Genus EUMACRONYCHIA Townsend 



Eumacronychia Townsend, Trans. Amer. Ent. Soc, vol. 19, p. 98, 1892,. 

 genotype decens in the University of Kansas Museum; Trans. Amer. Ent. 

 Soc, vol. 22, p. 74, 1895; Smithson. Misc. Coll., vol. 51, p. 64, 1908.— 

 CoQXJiLLETT, U. S. Bur. Ent., Tech. Ser., No. 7, p. 128, 1897; Proc. U. S. 

 Nat. Mus., vol. 37, p. 541, 1910 (equals Ililarclla). 



This genus, erected by Townsend in 1892, has long been considered 

 synonymous with TlilareUa and has never been generally accepted. 

 After a careful study of available material, including genotype speci- 



« Walton, Proc. U. S. Nat. Mus., vol. 48, p. 181, 1914. « Ent. News, vol. 30, p. 281, 1919. 



