INSECTS OF THE FIELD. 



case the young insects generally pass through the winter in 

 the pupa state, known as the "the flax-seed" condition, 

 because the pupa case is like a flax-seed. Any such found in 

 wheat screenings should of course be burned, and where found 

 in the field the stubble should be cut and burned. The 

 principal remedy for the Hessian fly then is to completely 

 burn all material containing the young insects and to change 

 from wheat to a cultivated crop, as roots or corn. The Hessian 

 fly attacks wheat, barley, and rye. 



The Clover-Seed Midge lays its eggs in the young clover- 

 heads where the larvae or orange-colored maggots hatch out 

 and do much damage. Then they fall to the ground and com- 

 plete their changes, appearing as full-grown insects towards the 



latter part of summer, ready to 

 do damage again to the second 

 crop of clover. Where the 

 midge is doing much damage 

 it is evident that the pasturing 

 off of the first crop of clover 

 will tend to destroy the larvae. 

 The first crop also may be cut 

 early, when in full bloom, be- 

 fore the first brood of maggots 

 develop. A regular rotation 

 of crops tends to keep in 

 check these and many other 

 injurious insects. 

 CONCLUSIONS : 



1. Insects are so-called because they are made up of sec- 

 tions. There are three main parts, the head, the thorax or 

 trunk, and the abdomen. The thorax and abdomen are also 

 made up of sections (see illustrations). 



2. The legs and wings of the adult or perfect insect are all 

 attached to the thorax. 



Fig. 41. Midge and larva. 



