316 



INTRODUCTION TO ZOOLOGY 



The Larva. 



The larva, when full grown, is about half an 

 inch long, and of a pale pinkish-yellow colour. It 

 bears round its mouth 

 specially modified sickle- 

 shaped jaws, with which 

 it pierces the body of its 

 prey and sucks up its 

 juices. In this way it de- 

 stroys large quantities of 

 green-fly. 



Finally, it 

 spins round it- 

 self a little, almost globular 

 cocoon of silk threads, 

 which are given out from 

 the last segment of the tail, 

 and manipulated by the 

 jaws into the required 

 shape. 



The Fupa. 



Fig. 238. — The Laoewing-fly 

 ( Chrysopa wlgaria). 



Cluster of eggs ; B, rose twig infested by 

 Aphides, a, and harbouring the lacewing- 

 fly in various stages ; e, larva of lacewing- 

 fly ; J), pupa ; i, imago. 



Fig. 239. 

 Larva of Lacewing-fly. 



(x4.) 



Family 6 : Phryganeidab (sometimes called Trichoptera) 

 (Caddis-flies) 



Caddis-flies differ in several respects from the more typical 

 Neuroptera. Specially to be noted in them are the hairs that 

 more or less cover the wings, and make them somewhat 



