3o6 Insects and their Surroundings 



Fig. 164. — A Hyperparasite {Dibrachys hotichcantis, 

 Ratz.), Europe, a. larva, magnified 8 times ; d. 

 its head, more highly magnified ; b. pupa of male, 

 magnified 10 times ; c. female, magnified 12 times ; 

 e. feeler, magnified 36 times. From Howard, Bull. 

 5 (tech. ser.), Div. Ent. U.S. Dept. Agr. 



in the neighbourhood of the ventral 

 then carry it to their nest before layin 



which do the 

 same to our- 

 selves, must be 

 regarded as pre- 

 daceous insects 

 rather than as 

 parasites, since 

 they boldly at- 

 tack the creature 

 whence they 

 draw their food, 

 and do not spend 

 their whole lives 

 in or on its body. 

 Some Dragon- 

 fly nymphs are 

 habitual can- 

 nibals, devour- 

 ing the weaker 

 members of their 

 own species. 



Many insects 

 hunt to get a 

 living for them- 

 selves, others to 

 furnish their off- 

 spring with food. 

 The Digging- 

 wasps seize 

 caterpillars or 

 spiders; they 

 paralyse or kill 

 the victim by a 

 sting sometimes 

 nerve-cords, and 

 g their eggs that 



