PLATE 1 
Platygaster vernalis 
A. —Female parasite poised on a blade of wheat and ovipositing in egg of 
Hessian fly. X45. 
B. —Egg of P. vernalis before oviposition. Much enlarged. 
C. —Longitudinal section through a young Hessian fly larva, showing a P. 
vernfalis parasite body in the mid-intestine. X55. 
D. —Longitudinal section through a well grown Hessian fly larva showing 
primary stage larvae of P. vernalis in the mid-intestine. X40. 
E. —Host larval carcass (cuticula) containing ten P. vernalis cocoons. X15. 
F. —Host puparium showing exit holes made by adult parasites. X14. 
( 840 ) 
