88 



THE ANATOMY OF THE HONEY BEE. 



described, by Bordas (1895) as a separate gland opening by two ducts 

 into the oesophagus just behind the pharynx. The writer, however, 

 has been utterly unable to discover any such ducts, though two sus- 

 pensorial ligaments of the anterior end of the oesophagus are at- 

 tached to the wall of the head at the posterior ends of these glands 

 (fig. 11 B, g) and might easily be mistaken for ducts. These " post- 

 ocellar glands " of Bordas, moreover, appear to be simply detached 

 lobes of the postcerebral glands. They are prominent also in the 

 queen (fig. 10 B, 2GI) and are represented by a few follicles in the 

 worker. 



Fig. 43. — A, small piece of large lateral pharyngeal glands in head of worker ; B, piece of 

 postcerebral salivary glands in head of drone ; C, postcerebral glands ($GZ) in normal 

 position against posterior wall of head in drone ; D, pharyngeal plate (s) of worker, 

 ventral view, showing bases of lateral pharyngeal glands (,1GI) and their receptacula 

 (mm), and median ventral pharyngeal gland (iGl) ; E, corresponding view of pharyngeal 

 plate of drone, showing entire absence of lateral pharyngeal glands, and greater devel- 

 opment of small median glands i.'iGl) ; F, part of postcerebral gland of worker. 



Bordas describes the follicles of the postcerebral glands in the 

 worker as hollow sacs, each having a large lumen lined with a chiti- 

 nous intima. Their secretion, he says, is a thin viscid liquid, pale 

 yellow in color and having a slightly alkaline reaction. According to 

 Schiemenz (1883) each gland is developed as an outgrowth from the 

 common duct of the thoracic glands. 



The salivary glands of the thorax in the bee {System No. 3 of 

 Cheshire, thoracic salivary glands of Bordas) are the ones that cor- 

 respond with the ordinary salivary glands of other insects. They 

 are described by Schiemenz (1883) as being formed inside of the 



