124 Invertcbrata. 



as food by some species of ants, especially in this 

 country by the red and yellow ants, which can be 

 seen to 'milk' the honey tubes with their antennse 

 and swallow the fluid. Several species of aphides 

 appear to be kept as ' milch kine ' by these ants, and 

 are fed by them apparently for this secretion. 



Other representatives of this order are the 

 cochineal and lac insects, the * water boatmen ; and 

 ' water scorpions/ as well as the numerous and often 

 brightly coloured field bugs. 



ORDER II. Thysanura. Fringe-tails, an unim- 

 portant group, consisting mostly of very small crea- 

 tures, sugar-lice, and spring-tails, which live in moss 

 or under stones, in cellars, or sugar stores, and can 

 be seen hopping or springing about, shunning the 

 light. 



They scarcely undergo metamorphoses, being the 

 most generalised of all insects, and their mouths ar6 

 suited for chewing. The extremity of the abdomen is 

 prolonged into a forked tail or a pair of bristles, 

 whereby the animal is enabled to progress by leaping. 

 The scales of the bodies of some of these Podurse 01 

 spring-tails are marked with very minute furrows. 



ORDER III. Euplexoptera. This order includes 

 the earwigs, which are remarkable for their curiously 

 folded hind wings, that lie folded like a fan under 

 cover of the hard-shielded forewings. They have a 

 masticating mouth, and posteriorly there is a pincer- 

 like post-abdominal appendage in both male and 

 female. The earwig is remarkable for sitting on her 

 eggs to hatch them, and for the maternal protection 

 which the female exercises over her young which 

 resemble her except in the absence of wings. 



