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 (Mt) 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, 2MdGl) is 
found in workers only on the inner wall of the postgena 
( Pge ) with an opening at the base of the mandibles. 
