16 



PHYSIOLOGY OF THE HONEY-EEE. 



resembles a string- cf cnicns, is absent in the drones and 

 queens. Aceoi'ding to Girard, these upper glands were dis- 

 covered by Meckel in 1S4G. 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 byes, that 



Pig. 6. 



SALIVARY GLANDS OF THE WORKER-BEE. 



(Magnlfled. After Barbfl. ) a, a, glands of the head; 6, glands of 

 the thora-x. The two upper pairs are glands of the head, the lower 

 are gland.s of the thorax. 



