The Life Processes of the Individual 137 



,,-Lbl 



FIG. 72. Mouth parts of the worker: A, tip of glossa; B, same from 

 above ; C, small piece of glossal rod ; D, parts forming the proboscis, 

 flattened out, ventral view ; E, cross-section of glossa ; F, end of 

 mentum (Mf) and bases of ligula (Lg) and labial palpi (LbPlp) ; 

 G, lateral view of proboscis, showing parts on left side ; H, lateral 

 view of glossa with its rod detached. 



that the wax is changed chemically when it is manipulated 

 by the mandibles. A second gland (Fig. 71, %MdGl) is 

 found in workers only on the inner wall of the postgena 

 (Pge) with an opening at the base of the mandibles. 



