308 



TEXT-BOOK OF ENTOMOLOGY 



ticulated along its free margin. These extend about half-way through the gizzard. 

 They appear to be alternately elevated and depressed during the action of the giz- 

 zard, and to serve to carry on the food to the twelve cutting teeth, with which 

 each ridge is also armed, and which occupy the posterior part of the organ. These 



Ip 



Fio. 313. Digestive canal of the honey-bee : A, horizontal section of the body ; Ip, labial pal- 

 pus; mx, maxilla; i\ eye ; j/rn. t, prothorax ; menu. 1, mesothorax ; metn. t, metathorax ; (/(', dor- 

 sal vfis-ifl ; r, r. vi'iili-icii-s of the xime ; No. 1, No. '2, No. 8, salivary (.'land systems ; ir, u-sci|ihai_Mis ; 

 g, ff, yantrlia of chief nerve-chain ; n, nerves ; //*, lioney-siu' ; ]>, petaloiil stopiier or calyx of lioney- 

 sac or Stomach-month; c. .v, chyle stomach; /'/.urinary tubes; .v/, small intestine (ilium) ; /, " la- 

 mellse or (.'land-plates of colon," rectal glands ; //, rectum. 7?, cellular layer of stomaeh ; ;/c, gastric 

 cells, x 200. C, urinary tube ; In-, cells ; t, trachea. I), inner layer, with gastric teeth (gt). After 

 Cheshire. 



