NO. 2 



HONEY BEE — SNODGRASS 



19 



Fig. 6. — The labium of the worker. 



A, end of prementum with ligula and bases of labial palpi, anterior view, 

 paraglossae in natural position. B, same, paraglossae spread apart exposing 

 salivary opening (SIO). C, same, posterior view, showing base of glossal 

 rod (rd) and entrance to salivary channel (sc). D, two tiers of glossal hairs, 

 anterior view. E, base of glossal rod exposed by eversion of salivary channel. 



F, ligula and salivary syringe, anterior view, anterior wall of syringe removed. 



G, end of glossal tongue, posterior view. H, diagram of base of protracted 

 tongue. I, same, tongue partly retracted by contraction of glossal muscles (20). 



h, Hgular arm of prementum ; i, pivotal process of base of tongue ; /, basal 

 plate of tongue; k, subligular plate of prementum; /, canal of glossal rod; 

 m, membranous wall of salivary channel ; n, elastic posterior rod of labial 

 palpiger; rd, glossal rod; sc, salivary canal of tongue. 



