NO. 2 



HONEY BEE SNODGRASS 



hypopharyngeal and labial muscles become antagonistic dilators and 

 compressors of the salivary chamber thus formed. The saliva pre- 

 sumably is conveyed around the base of the tongue within the para- 



FiG. I. — The head and cranial structures of the worker. 



A, anterior view of head. B, posterior view of head, with bases of labium 

 and maxillae. C, right half of head, mesal view, showing right tentorial bar. 

 D, foramen magnum and associated structures, posterior view. E, horizontal 

 section of head through upper part of foramen magnum and below bases of 

 antennae, dorsal view. 



a, shelflike plate on lower margin of foramen magnum ; b, hollow bar from 

 posterior tentorial pit {pt) to plate a on lower margin of foramen. 



glossal lobes and carried out to the tip of the tongue through the 

 salivary channel on the under side of the latter. 



The head. — On the facial aspect of the bee's head (fig. i A) the 

 significant feature is the unusual size of the clypeus (Clp), which 



