82 



THB BEB-KBEPBR'S GUIDE; 



tral side of the body, separates near the head, and after pass- 

 ing around the oesophagus, enlarges to form the largest of the 

 ganglia, which serves as a brain (Fig. 27, 28). The uncovered 



Fig 



Xervoiis tSijstem of Drone, afhr Duncan. 



brain shows marked convolutions (Fig. 30). Dujardin states 

 that the brain of the worker-bee is 1-174 of the body ; in the 

 drone it is relatively much smaller ; the ant, 1-286 ; the ich- 



