56 



NATURAL HISTORY OF INSECTS. 



part is thin and more membraneous (such as those of the 

 Harlequin Cabbage-bug, Fig. 160). When at rest the wings 



Fig. 162 

 Fig. 160. 



Fig. 161. 



lie flatly upon the back, and overlap each other at the tips. 

 The beak issues from the fore part of the under side of the 

 head, while in the Homoptera it issues from the posterior part 



164. 



Fig. 165 



of the under side of the head. In a few small species, such as 

 the Thrips (Fig. 161) and the wingless Lice, the mouth is 



