SYSTEMATIC ARRANGEMENT. 103 



5. Those with a sucker bent under the breast. 

 Tree-hoppers, Lantern Flies, Frog-hoppers, Plant Lice 

 or Aphides, and Cochineal Insects or Cocci (*). 



II. FOUR WINGED INSECTS WITH THE FIRST PAIR 



MORE OR LESS THICK OR HARD. 



Divided into 



1 . Those with the first pair of wings leathery at the 

 base, and over-lapping the second pair cross-ways, and 

 having a sucker bent under the breast. Tree and Plant 

 Bugs (the bed bug has no wings) , Water Bugs, and 

 Water-measurers ( 2 ). 



2. Those with the first pair of wings leathery through- 

 out, overlapping at the edges only, and covering the 

 second pair, which are folded lengthwise. Locusts, 

 Grasshoppers, Crickets, Mole-crickets, and Cock* 

 roaches ( 3 ). 



3. Those with the first pair more or less horny, 

 forming cases, sometimes long, sometimes short, for 

 the second pair folded up when at rest beneath them. 

 Beetles, Chafers, Weevils, Earwigs ( 4 ). 



III. TWO WINGED INSECTS. 



Divided into 



1 . Those with poisers in place of the second pair of 

 wings and a sucker. Gnats, Mosquitoes, Crane Flies, 

 Midges, Gadflies, Dung-flies, Bee-flies, and Common 

 House-flies ( 5 ). 



2. Those with only two wings, in some cases none, 

 and longish jaws. Bird-flies, Bat-flies, Sheep-flies, 

 Forest-flies ( 6 ). 



(1) In Latin, Homoptera, (LEACH). 



(2) In Latin, Hemiptera, (LEACH). 



(3) In Latin, Orthoptera, (OLIVIER). 



(4) In Latin, Coleoptera, (ARISTOTLE). 



(5) In Latin, Diptera, (ARISTOTLE.) 



(6) In Latin, Homaloptera, (LEACH). 



