INSECTS. 



105 



brought forth alive. Two of the four stages are 

 active and two are dormant. The larva and adult 

 are active stages, the egg and pupa are dormant. 

 Since the good or harm an insect does is in its 

 eating, it is essential to find in what stage the most 

 eating is done. In other words, its habits and life 

 history must be learned. 



Most moths and butterflies eat an enormous 

 amount in the larva, or caterpillar stage, but only 



CABBAGE BUTTERFLY, CATERPILLAR, AND CHRYSALIS. 



sip a little honey occasionally in the adult stage. 

 Some beetles do as much eating in the adult as 

 they do in the grub stage, but the food generally is 

 of a different character. The Colorado potato 

 beetle lives on the potato plant during all its 

 stages, the larva and adult both eating the leaves; 

 while the cabbage butterfly lives on the cabbage 

 leaf only in the larva stage, the adult flying in the 



