256 



ARTHROPODA 



[CH. 



This group comprises the Ants, Bees and Wasps. Many of 

 them live in highly complex communities, in which small sterile 

 females act as " workers," and in their social habits and general 

 intelligence they reach a level which is only surpassed by man him- 



1. 



Fm. 108. Formica rufa, the Wood-ant. 

 Female. 2. Male. 3. Neuter. 



Worker-bee. 



Queen-bee. 



Drone. 



FIG. 109. Apis mellifica, the Honey-bee. 



FIG. 110. Polistes tepidus and nest. 



self. The group includes the Wood-wasp, Sirex ; the Saw-fly, 

 TentJiredo; the Gall-fly, Cynips; the Ichneumon ; the Ant, Formica-, 

 the Wasp and Hornet, Vespa\ the Humble-bee, fiombus; and the 

 Honey-bee, Apis. 



