HEXAPODA : ORTHOPTERA OR EARWIGS, ETC. 



531 



FIG. 444. 



Squash-bug, Coreus 

 tristis, DeGeer. 



parocliromus), the great wheat-destroyer, 

 and the well-known Squash-bugs (Coreus), 

 both of which, by some writers, are 

 referred to one family Oorisise. And to 

 this sub-order belong also the minute 

 insects known as the Thripsidse, which 

 cause the decayed patches on leaves, 

 melons, etc. ; and the disgusting Bed-bugs 

 or Cimicidae ; and the Lice or Pediculidae. 



6. THE SUB-ORDER OF ORTHOPTERA, The name of this 

 group is from the Greek orthos, straight, and pteron, a 

 wing. The Orthoptera have wings which lie straight 

 along the back, and have their upper wings rather 

 thick, the under ones the larger and thinner, and folded 

 in plaits like a fan. The Orthoptera do not undergo a 

 complete transformation, but they pass by insensible gra- 

 dations from the larval to the adult stage, all the while 



O / 



remaining active. A few of the leading forms are here 

 enumerated, and some of them illustrated. 



FlG - 445 - The so-called Earwigs or Forficulidse, 



have the body armed at the hind ex- 

 tremity with a pair of pointed nippers. 

 The Cockroaches or Blattidse, have the 

 body broader, flattened, 

 and the hind extremity 

 furnished with conical 

 articulated appendages. 

 The Walking-sticks (Fig. 

 449) and Walking-leaves, 

 or Phasmidre, closely re- 

 semble twigs and leaves. 



FIG. 446. 



Cockroach, Btatta orieutatis, 

 Ljun, 



The Mantes or Manti- 



Earwig, Forficu- , ill 



/a . da?, are much elongated, 



