258 



ORDER DIPTERA 



enough to be cut ojff and carried with the straw when the 

 wheat is harvested, but more commonly are left in the 



Fig. 201. — Egg of Hessian fly — greatly en- 

 larged; section of leaf of wheat, at right, 

 showing eggs as usually deposited, less 

 enlarged. (After Webster, Div. Ent., U. S. 

 Dept. Ag.) 



Fig. 202.— The Hess- 

 ian fly : larva before" flax- 

 seed" is formed — much 

 enlarged. (Webster, Div. 

 Ent.. U. S. Dept. Ag.) 



Fig. 203.— The Hessian fly: larva 

 taken from "flaxseed," much enlarged 

 with "breast-bone" still more enlarged 

 at right. (After Webster, Div. Ent., 

 U. S. Dept. Ag.) 



Fig. 204 —The Hessian 

 fly: pupaiium or "flax- 

 seed," much enlarged. 

 (After Webster, Div. 

 Ent., U. S. Dept. Ag.) 



stubble. They sur\'ive the midsummer in this condition and 

 are apparently dependent more or less on conditions of 



