REPORT OF THE SOCIETY 115 



Heads. 



(a) Heads turn white and grains are shrivelled or imperfectly filled. 

 Wheat Stem Maggot (IMeromyza Americana) and American Frit-fly 

 (Oscinis carbonaria) . 



(b) Heads shrivelled and blighted, and imperfectly filled, and the 

 presence of orange colored maggots. Wheat Midge (Diplosis 

 tritici). 



(c) Heads covered with green plant lice. Grain Louse (Aphis avenae). 



(d) Heads turn white; minute dots or lines on leaves usually running 

 parallel with the veins and remaining white; the work of minute 

 insects. Grass Thrips (Anaphothrips striatus). 



(e) Spotting of the leaves, spots whitish at first, turning brown or 

 black. Six-spotted Leaf-hopper, Cicadula 6-notata. 



