96 



MISC. PUBLICATION 17 4, U.S. DEPT. OF AGRICULTUEE 



Semiotellus isosomatis Dalla Torre, Catalogus hymenopterorum . . ., v. 5, 

 p. 211, 1898; Webster and Reeves, U.S.Dept.Agr., Bur. Ent. Circ. 106: 8, 9, 

 fig. 11, 1909. 



Merisus febriculosus Girault, Descriptiones stellarum novarum, p. 17, 1917; 

 Gahan, Ent. Soc. Wash. Proc. 22 : 238, 1920 ; Phillips and Poos, U.S. Dept. Agr. 

 Farmers' Bui. 1323: 8, 1923; Hill and Smith, Jour. Agr. Research 36: 153, 

 1928. 



Figure 21. 



-Merisus febriculosus Girault : A, Adult female ; B, 

 C, antenna of male. A, X 21. 



antenna of female 



DESCRIPTION 



The female of Merisus febriculosus is readily distinguished from 

 other hessian-fly parasites, except M. mordellistenae Crawford, by 

 its broadly ovate and almost wholly yellow abdomen. It is very 

 similar to M. mordellistenae, which also occasionally attacks the hes- 

 sian fly, but it may be distinguished from that species by its shal- 

 lower and finer punctation, the much finer and less conspicuous hairs 

 on the face and dorsum of the thorax, the longer antennal joints in 

 both sexes, and its dark greenish color. It also resembles Homoporus 

 fulviventris (Walker), but in that species, the type of which has been 



