CHERMES. 



245 



remedies. Paraffin emulsion spraying is 'beneficial in some of 

 the softer scales. 



ApPLE-SUOKEII OE ChBRMES (Psi'LLA MALl). 



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 Psyllidw are Hemiptera related to the Aphides, with 8- to 

 10-jointed antenna, which end in two short slender bristles. 



Fto. 125. — Appt.f-ruoker (Psylla maJi). 

 1 and la, Pupa, nat. size, and mag. ; 2 and 2a, imago, nat. size, and mag. (Wliitehead.) 



Unhke plant-lice, they have three ocelli, and their legs are 

 formed for leaping. They Uve upon the sap, and, like Dolphins, 

 discharge a sweet fluid, sought after by ants. The larvse are 

 often protected by a cottony secretion. 



The species infesting the apple is found early in the year 



