The Life Processes of the Individual 
137 
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 (Ml) and bases of ligula (Lg) and labial palpi ( LbPlp ); 
G, lateral view of proboscis, showing parts on left side ; H, lateral 
view of glossa w r ith its rod detached. 
that the wax is changed chemically when it is manipulated 
by the mandibles. A second gland (Fig. 71, 2MdGl ) is 
found in workers only on the inner wall of the postgena 
{Pge) with an opening at the base of the mandibles. 
