INTRODUCTION 



such a reverential attitude, and the ravenous Mosquito 

 of other lands than ours, also belong to this important 

 Order. 



Order IV (Rhynchota) has among its members the 

 detestable Bed Bug {Cimcx Icctularius) ; those familiar 

 little tenants of our ponds and streams, the Water Boat- 

 man and Water Scorpion ; the active little Frog Hopper 

 whose frothy secretion is such a feature of our country- 

 side when Summer returns again ; the amazing Aphis, 

 or Green Fly ; the Apple Sucker, and the Scale Insects. 

 All these undergo an incomplete metamorphosis, and it 

 may be mentioned that the Cicadas, whose stridulating 

 music is such a feature of the regions they inhabit abroad, 

 and the Lantern Flies, also find a place in this fourth 

 Order, although unrepresented in Britain. 



Order V (Coleoptera) is made up of Sheath-Winged 

 Insects, or Beetles, some large (as in the Great Water 

 and Stag Beetles), others so small as almost to escape 

 detection, and yet of perfect mechanism throughout, 

 and all undergoing a complete metamorphosis. The 

 useful Ladybirds are included among these coleopterous 

 insects, and there are several other familiar representa- 

 tives of which we have something to relate hereafter. 



Order VI (Neuroptera) may be conveniently divided 

 into six Sub-Orders as follows : — 



1. Corrodentia, (Book Lice.) 



2. Plecoptera, (Stone Flies.) 



3. Sialida, (Alder FUes.) 



