IO4 



THE WHEAT INDUSTRY 



FIG. 60. The Hessian fly : adult female at the left, adult male at the right - 



both enlarged several times. 



Rearranged by M. H. Swenk, from Webster, Marla.lt, and Washburn. 



FIG. 61. The later stages of the Hessian fly: a, four larvae changing to the 

 flaxseed stage, enlarged four times ; b, flaxseed or puparium, much enlarged ; c, 

 larva taken from flaxseed, much enlarged ; e, infested wheat plant showing 

 emergence of pupa: and adults, enlarged. 



