FIG. 16. HESSIAN FLY; a healthy stalk of wheat on the left, the one on the right dwarfed and 

 the lower leaves beginning to wither and turn yellow; the stem swollen at three places near 

 the ground, where the "flax-seeds" (h ) are situated, between the stem and sheathing base of the 

 leaf; a, egg greatly enlarged; 6, larva enlarged; c, "flax-seed" or puparium case; d, pupa; 

 e, adult, natural size, laying its eggs on the leaf; /, adult, female, enlarged; g, adult, male, 

 enlarged; ft, "flax-seed" between the leaves and stalk; i, Ichneumon parasite of the Hessian 

 Fly, male, enlarged. 



