SEEPHOID AND CHALCIDOID PAKASITES OF THE HESSIAN FLY 31 



with a faint aeneous cast ; abdomen black with a slight metallic cast in some 

 lights ; antennae black, the apex of club usually brownish ; legs, except coxae, 

 reddish yellow; wings hyaline, with a faint brownish stain beneath marginal 

 vein, the venation brownish testaceous ; ovipositor sheaths black. 



Male. — Length 1.5 mm. Like the female except as follows : Posterior orbits 

 a little broader and less receding, eyes and ocelli smaller, ocellocular line and 



Figure 7. — Pseuderimerus mayetiolae Gahan : A, Adult female ; B, antenna of female ; 

 G, antenna of male. A, X 32. 



postocellar lines nearly equal, the latter four or five times as long as the diame- 

 ter of an ocellus ; the antennae a little shorter, with funicle joints smaller than 

 in the female but of about the same relative proportions, the apical club joint 

 a little more distinctly set off from the preceding by a groove; abdomen 

 elliptical, largely yellowish above and below with the margins black ; apices of 

 coxae usually yellowish like the rest of legs. 



Described from 111 specimens in the National Museum collection in- 

 clusive of the type series, all of which were reared from the hessian fly. 



