THE PARASITE OF THE TIGER CATERPILLAR. 21 



It crawled out through the hole and was ready to fly away. 

 In a short time, if out-of-doors, it would search for other cater- 

 pillars in order to lay eggs in them. 



You will see from this account of the life of the ichneumon 

 fly that it is a parasite. There are many different kinds or 

 species of these ichneumon parasites. One of the largest of 

 those which attack the tiger caterpillar is represented natural 

 size in Fig. 21. 



