/ W I i - INJURIOUS TO AGRICULTURE. 



195 



w heal :un 1 burning the Btub- 

 ble are of doubtful use, as 

 this desl roj - the useful para- 

 sites as \\ ell ;i- the :i 



The Wheat-midge (Di- 

 plosis tritici Kirby). — 

 This Bpecies injures the 

 head. Several minute 

 orange-red maggots, an 

 eighth of an inch long, 

 crowding around t be ker- 

 nel - of wheat, cause them 

 to shrive] and dry when 

 ripe. The maggots de- 

 scend into the ground and 

 spin minute cocoons, from 

 which in the following 

 J n n e emerge 1» r i g li t 

 orange - colored mid 

 This insecl is far 

 common and destructive 

 than the Hessian fly. 



Ill mi DT. Plough deep 



after harvest, and bum the 

 •• screenings" after threshing. 



Chinch - bug (Blissus 

 Isucopterus Say). — This 

 bug, while young, sucks 

 its of wheat and 

 corn, afterwards infesting 

 in greai numbers the 

 stalks and leaves, punc- 

 turing them with its 



beak. It appears earlv '" : '-' :!< Wheat-mid te- 



1 ' • male; c\ « ing, 



in dune, and there is & of male: r, with 



. its two sliding tub nal a] 



summer and an autumn dages for guiding lar 



, , , 'li-i rnel; i, the I . the 



broocl, the adults Inner- same, natural s crawling, 



with its antenna fc, anterior, /, 



nating in the stubble. 



srior, end > r J iu-h. 



