PEAR PESTS. 



119 



plum, and cherry trees, and live in communities therein. 

 They measure about half an inch to an inch in length, and 

 are of a reddish or a reddish-orange colour, smooth shin- 

 ing, and somewhat cylindrical in shape. The female Saw- 

 fly lays her eggs on the inside of the pear leaves, towards 

 the end of May. The caterpillars hatch out in a few days, 



PEAR MIDGE (DIPLOSIS 



A, the Midge or Gnat with line below to indicate 

 grub with line to show its natural length; 0. chrysalis 



PTRIYORA). 



ts natural size; B, 



the 



and then start to spin the web, already described, round 

 and over the foliage, and, secure in this habitation, com- 

 mence to devour the leaves. When fully grown they let 

 themselves down to the ground, boring into the earth some 

 four inches or more deep, and then enter into the pupal 

 state. Here they remain until the following April or May, 

 then emerge as Sawflies. 



Eemedies.— As it is very difficult to reach the larvae 

 ensconced within the webs by means of insecticides, the 

 best plan is to pull off all the webs and contents by night 

 and immediately destroy them. Where this cannot be 



