44 REPORT ON INJURIOUS INSECTS FOR 1906. 



On reaching the imago stage, the pairing of the sexes is soon 

 effected ; the female then lays her eggs, and shortly afterwards dies, 

 the generation or life-cycle being thus completed. In some cases the 

 perfect insect only lives a few hours or days, but in others they hiber- 

 nate during the winter, and lay their eggs in the following spring. 



Before the depredations of any particular species of insect can be 

 effectively dealt with, it is important that all the stages and variations 

 of the life-cycle should be clearly and thoroughly understood. 



