INJURING THE TRUNK. 75 



Remedies. — Spraying the infested trees with the 

 arsenites, Paris green or London Purple, is the most 

 promising method of preventing their injuries. 



The Cherry-tree Leaf-roller. 



Cacoecia cer.asivorana. 



One occasionally finds the leaves of a cherry twig' 

 fastened together in a large, compact nest, inhabited 

 by numerous yellow caterpillars, that feed upon the 

 enclosed leaves. This is the Cherry-tree Leaf-roller. 

 The adult is a small brown moth which deposits a 

 large number of eggs upon the twig. The caterpil- 

 lars on hatching fasten the leaves together and de- 

 velop within the tent thus formed. They beeome' 

 full grown about midsummer, and pupate within the' 

 nest. In a week or so they are ready to change 

 again, and the pupse work their way out until they 

 are nearly free from the nest, remaining attached by 

 the hinder portions of their bodies. The skin then 

 splits along the back and the moths come out. 



Remedies. — These nests are so conspicuous that 

 it is a simple matter to cut and burn the infested 

 twigs, thus ending the career of the pests. 



The Pear-tree Slug. 



Selandria cerasi. 

 This insect is probably as destructive to the cherry 

 as to the pear, under which we have already dis- 

 cussed it. Its life-history on the two fruits is similar, 

 and the remedies are the same in both cases. 

 5 



