EXPERIMENT STATION BULLETINS. 



137 



14. THE HESSIAN FLY. 

 {Cecidomyia destructor.) 



FifC. !•">. Hessian fly. Crridoin i/hi thul rurfnr. After I'at-kanl. Tliird Ki'port of Kntomological Cdiii- 

 inission, Division of KiitoiimlDgy, Department of Agriculture. 



IS 



