16 



PHYSIOLOGY C? THE HOKEY-EEE. 



resL'mb.es a string cf cniciis, is absent in the drones and 

 queens. According to Girard, these upper glands were dis- 

 ■covered by Meckel in 1846. They are very large and dilated 

 in the young worker bees, while they act as nurses, but are 

 slim in the bees of a broodless colony. In the old bees, that 



Fig. 6. 

 SALIVARY GLANDS OF THE WORKER-BEE. 



IMagnifled. After Barb6. ) a, a, glands of the head; 6, glands of 

 tie thorax. The two upper pairs are glands of the head, the lower 

 -are glands of the thorax. 



