ORDERS. 



27 



Orders of Insects. 



WITH JAWS. 



Coleoptera. Neuroptera. 



Euplexoptera. Triclioptera. 



Orthoptera, Hymenoptera. 



Thysauoptera. Strepsiptera. 



WITH SUCKERS. 



Lepicloptera. 



Homoptera. 



Heteroptera. 



Aplianiptera. 



Diptera. 



For working purposes, however, in connection with 

 crop insect pests, it will be much more convenient, 

 instead of studying the orders in the succession noted 

 above, to take, yirsf//y, those orders which are maggots, 

 or caterpillars, in their first state, and arrange them, 

 in succession, by the increase in the number of legs 

 or sucker-feet of the grubs, and wings, or apparent 

 wings, in each order ; secondly, the orders which are 

 nearly alike in all their states, as Grasshoppers and 

 others ; and, tJiirdly, just to give a few words respecting 

 the orders which, for agricultural purposes, require 

 some little further attention. 



Fig. 22.— Carrot Fly : 1 and 2, maggot ; 5 and C, pupa. All nat. 

 size and magnified. 



Firstly, then, we take the five following orders : — 

 1, Flies; 2, Fleas; 3, Beetles; 4, Moths and Butter- 

 flies ; and 5, the order which includes Wasps, Ants, 

 Sawflies, Ichneumon Flies, and many other Wasp- 

 like Flies. 



