Insect Enemies and Allies 



203 



U. S. D. A. 



FIGS. 154 to 157. A biting insect: the Australian ladybird beetle at different 

 stages (much enlarged). Fig. 154, larvae (lower left corner); Fig. 155, pupa 

 (upper left corner) ; Fig. 156, adult (upper center) ; Fig. 157, larvae and adults 

 attacking cottony-cushion scale (right). 



Of course the larger eggs never hatch, but instead furnish 

 food for the tiny grubs which develop within them. 

 Most parasites attack caterpillars or other larvae, rather The fate of 

 than eggs or adult insects (Fig. 158). Often a cater- 

 pillar that is attacked does not die in the larval stage, 

 but succeeds in forming a chrysalis. The butterfly, 

 however, never emerges, but a whole swarm of some very 

 different insect comes forth. 



many cater* 

 pillars 



