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CHAPTEE VIII. 



INSECTA OR IIEXAPODA. 



The Insects proper, more correctly termed Hexapoda on account 

 of the number of their legs, have received a large share of 

 attention economically. Certainly this is justifiable, for the 



FiQ, 49. — A Hexapod i^Tipula oUracca), Note the six legs on ventral part 

 of thorax. (Nicholson.) 



damage they often occasion is very severe, not only to crops, but 

 also to stock. 



Insects are characterised by possessing three pairs of jointed 



