624 



CLASS IV. INSECTA. 



FIG. 381. A view "of [the alimen- 

 tary canal and its appendages of 

 An&pheles maculipennis, magnified 

 (after Nuttal and Shipley). 1 

 buccal cavity ; 2 pharynx ; 3 

 dorsal reservoirs ; 4 crop and 

 caeca ; 5 midgut begins ; 6 

 " stomach " ; 7 malpighian tube ; 

 8 midgut ends ; 9 ileum ; 10 

 colon ; 11 rectum ; 12 anus ; 

 13 ventral reservoir ; 14 salivary 

 glands ; 15 oesophagus ; 16 sali- 

 vary duct. * 



12 



