272 



HEMIPTEEA-HOMOPTERA. 



oval, flattish, pale or red-brown larvie, which wander about 

 and attach themselves to the bark during the winter and remain 

 dormant; some grow before to some extent. In spring they 

 move to the young wood and leaves and gradually grow into 



-m 



Fig. 150.— The Brown Currant Scale (Iccajiiiim^rsjcre, v. ribis). 



Larva magnified about 50 diametRrs. 

 w, Month-parts 



Under-sideof youngfemale magnified about 

 15 diameters, c, Cliannels leading to respir- 

 atory tubes (stigmata) ; m, mouth-parts. 



the mature brown females. The male has not been found 

 in Britain. 



Treatment consists of winter spraying with caustic alkali 

 wash, and spring spraying with parafifin jelly. 



Family PSYLLIDiE. 



Apple-sucker (Psylla mah). 



A great deal of damage is done to the buds and blossom of 

 apples by a small yellowish-green fly called the apple-sucker. 

 The rKijUidoi are liemiptera related to the Aphides, with 8- to 



