224 



Insect Pests. 



extremity is very noticeable, so also are the two caudal bristles ; in 

 form, the Iarva3 are roughly oval. The eyes are dark, and the 



an ten me have distinct 

 long hairs of specific im- 

 portance. On the antenna- 

 live bristles occur, of which 

 that on the third joint and 

 that on the last are the 

 longest. After five days 

 the surface of the larvae- 

 became keeled and more 

 or less striated, ;md more 

 convex in form. They 

 showed a distinct aversion 

 to light, both natural and 

 artificial. At the end of 

 ten days the larva' re- 

 mained stationary and the 

 skin commenced to harden. 

 Previous to this some of 

 them were more or less 

 covered with little grey 

 woolly granules. 



The white nest sub- 

 stance is said by Xewstead 

 to be secreted behind and 

 beneath the female's body. 

 By May the females are 

 mature, but the nest is- 

 not formed at once, and 

 according to my observa- 

 tions the females do not 

 commence egg-laying 

 until June and continue 

 until July, the larvav 

 hatching out over a period 

 of six to eight weeks. 

 AVhen the full complement of eggs is laid the female dies, and her 

 shrivelled body remains behind at one end of the cushion, now loose 

 and irregular. 



I have never seen a male scale of this species. Xewstead (2) 

 states that it is like the typical male of Lecanium. 



FIG. 171. THE WH1TK WOOLLY CfUHANT SCALK 



(Piilnnaria vitfe var. ribexia-'). 



