rig, 5 



PLATE XXV. Fig. i. — Vertical longitudinal section of the body of a larva 

 of an insect ; s, body-wall or skeleton ; w, muscles ; n, alimentary canal ; A, 

 heart ; «, nervous system ; r, reproductive organs. Fig. 2. — Section of the 

 body-wall; f, cuticle ; /i, hypodermis ; z", trichogen or hair-formingcell. Fig. 3 

 — Head of a bee and its appendages; a. antenna ; c, clypens ; ?<, upper lip or 

 labrum; vi, mandible; t/i.r. maxilla; A lower lip or labium ; /, labial palpus. 

 Fig. 4. — Glands of a honey-bee (after Girard); /, supracerebral glands ; 2. post- 

 cerebral glands; j thoracic glands. Fig. 5. — The wax-plates (after Cheshire). 



