22 



ZOOJA)GY 



Tlic order Hemiptera includes certain insects which resemble 

 the (Jrthoptera in undergoing an incomplete metamorphosis; 

 so that the young, or larvs, look much 

 like the adults in form and develop 

 without sudden transitions. They rlif- 

 f er from the Orthoptera in ha\'ing mouth 

 parts adapted to piercing tissues and 

 sucking the juices of animals and plants. 

 There are two main groups ; namely, 

 the True Bugs, or Heteroptera, in which 

 the first pair of wings are thick at the 

 base but have thin tips overlapping 

 each other over the back (Fig. 16), and 

 Fig. 17. — TheSpincdTree- tfie clcar-winged bugs, or Homoptera, 

 bug. After Lugger. jj-^ which the entire wings are thin and 

 trans])arent and rest in contact over the back like the sides 

 of a roof. 



The suborder Heteroptera includes a vast number of insects 

 usually of small size and of very varied habits. Some of them 

 live under the water and are 

 known as water-boatmen, 

 back-swimmers, water-scor- 

 pions, and giant water-bugs. 

 Others skip over the surface 

 of the water and are known 

 as water-striders (Fig. 18), 

 while still others live only (jn 

 land. Some of the latter, such 

 as the chinch-bug, squash- 

 bugs, and stink-bugs, are very destructive to jMants. Still 

 others, such as the assassin-bugs (Fig. 19), kill injurious in- 



Fid. IS. — (Hy 

 water-striiler. 

 W.H. C. P. 



rotrechus.) The 

 Nut. size. Photo, by 



