SERPHOID AND CHALCIDOID PARASITES OF THE HESSIAN FLY 131 



the southern part of the United States from the Atlantic nearly to 

 the Pacific. It is apparently absent from a large part of the prin- 

 cipal wheat-growing area of the country. 



IMPORTANCE 



Horismenus texanus is of no importance as a parasite of the 

 hessian fly. Its value in the control of Meromyza is not known. 



Figure 30. — Pleurotropis benefice/ Gahan : A, Adult female: B, antenna of female; C, an- 

 tenna of male. A, X 20. 



PLEUROTROPIS BENEFICA Gahan 



(Fig. 30) 



Pleurotropis sp. Gahan, U.S. Dept. Agr. Bui. 834:12, 1920. 



Pleurotropis benefica Gahan, Ent. Soc. Wash. Proc. 23: 117, fig. 2, 1921: 

 Hies, Jour. Agr. Research 32 : 293, 1926 ; Thompson, Empire Marketing Bel. Pub. 

 29 : 101, 1930 ; Salt, Bui. Ent. Research 22 : 541, 1931 : Smith, Bui. Ent. Research 

 22 : 548. 1931 ; Gahan, Ann. Ent. Soc. Amer. 25 : 751, 1932. 



