Wasps, Bees, and Ants 561 



an extreme in this specialization has been reached as shown by Polyergus 

 which is abjectly dependent on its slaves. It is no longer capable of digging, 

 is unable to take enough food, unaided by its slaves, to keep it from starva- 

 tion in a nest stored to repletion, nor can it care for its own young. Speciali- 

 zation is leading Polyergus to its end 1 



