14 



METHODS OF INSECT LIFE. 



above are not mere matters of curious enquiry, but 

 can be used very serviceably. 



Insects, if circumstances permit, lay their eggs 

 where the larvffi which come out from them will be 

 able to feed at once ; therefore we may prevent a 

 great deal of coming attack by clearing away the 

 large amount of weeds which many kinds of insect 



^ 



'^^ 



/ J 



Fig. 13. — Sawfly caterpillars destroying Turnip-leaf. 



Iarva3 feed on as well as the cultivated crops ; and 

 thus we greatly lessen attraction for the insects to the 

 neighbourhood. On the same principle pasture land 

 is dressed, or sheep folded, to keep off egg-laying ; or 

 ground is drained where special pests prefer wet 

 land. 



