56 



PRIZE ESSAY 



the Hessian fly is from Dr. Fitch's admirable essay on this in- 

 sect : "About the first of May the fly appears^ and deposits its 

 eggs upon the same crop of grain that had already reared one 

 brood, and also upon any spring wheat that is sufficiently for- 

 ward for its purposes. The radical leaves of the winter wheat 

 are now more or less withered, and the fly therefore selects the 

 more luxuriant leaves that have put forth above these. The 



ipp»»„e «f . he.,.l.y ,") «a two d.e.- sU-'^/J^-J-'Br^S 

 f-H-^ Stalk brolvcii, from bems weakened by the wornis. vii/ 

 (tt) ^talk oroKcn, jiuu. u r. ■. „„a nprforatediby parasites coming 



swollen from worms liavint; Inin under it, and peiioraieu^ j 

 from those worms.-From Dr. Fitch's Report. 



