124 Invertebrata. 



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 antennae 

 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. Spring- tails, an unim- 

 portant group, consisting mostly of very small crea- 

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

 damp cellars, or in sugar stores, and can be seen 

 hopping or springing about and shunning the light. 



They scarcely undergo metamorphoses, and their 

 mouths are suited for chewing. The extremity of the 

 abdomen is prolonged into a pair of bristles or a 

 forked tail, whereby the animal is enabled to progress 

 by leaping. The scales of the bodies of some of 

 these Podurae or 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 long 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. 



