Insect Enemies and Allies 



Am. Mus. Nat. Hist. 

 FIG. 146. Pupa of fly. The resting stage lasts for about 5 days. 



Am. Mus. Nat. Hist. 



FIG. 147. The adult fly. About 10 days after leaving the pupa case, the fly 

 is ready to lay a batch of perhaps 120 eggs. (Figures 144 to 147 are from 

 photographs of large models.) 



at all, but a caterpillar. There are many insects which The butter- 

 in form resemble a worm, when they are first hatched 

 from the egg. In this wormlike stage of life they are 



called " larvae " (singular, " larva ") Many insects 



p ' 



