598 



ORDER HEMIPTERA. 

 SUB-ORDER HETEROPTERA. 



(Bugs.) 



The metamorphosis is incomplete, and the younger 

 larvffi usually differ markedly from the adults ' tints ; 

 in one species where the adult is green the larva?, 

 resemble autumn leaves of beautiful orange red. 



These insects vary in habits and in size. They 

 liave the piercing and sucking mouth (Plate 52., 

 Fig. 8), and live, in most cases, on plant juices, 

 tliough some are carnivorous; some are aquatic 

 iJi habit. The metamorphosis is incomplete. 



The wing formation is important, and serves to 

 distinguish this group from the other sub-order 

 (Homoptera). The inner half of the fore wing is 

 opaque and horny, while the outer portion is 

 membranous and semi-transparent. (Plate 52, 

 Figs. 7 and 10.) The hind Avings are membranous. 

 I Plate 52, Fig. 7 b.) 



The antennae are usually prominent, but may be 

 wholly concealed beneath the head. 



Bugs are found more frequently on the foliage 

 of plants, but also on bark of trees, under stones 

 and logs; hence most bugs are pests, though 

 some of the carnivorous types feed on leaf-eating 

 caterpillars. 



A noticeable feature of many of tliese insects 

 is the enlargement of the part of the third seg- 



I 



