ECONOMIC ENTOMOLOGY. 19 



few inches, so that they are out of the reach of their ene- 

 mies. They mature in two or three weeks, when they 

 descend and pupate. 



There is but a single brood. They sometimes attack 

 plum, cherry and elm trees. 



The best and most effective remedy is to spray the larvae 

 with arsenical poison. 



THE STRAWBERRY LEAF ROLLER. 



{Phoxopteris comptana.) 



This insect generally hibernates in the pupa state, rolled 

 up in the strawberry leaf ; but sometimes as an imago. 



Those that have wintered as pupae emerge in April and 

 May, and deposit their eggs in May and June; the larvae 



^^^S^l^ 



Fig. 15. Moth of Strawberry Leaf Roller. 



getting their growth in July. The second brood matures 

 late in September. 



The only effectual remedy is to mow the strawberry field 

 close, after the fruit has been picked, and after letting the 

 grass, etc., become dry, burn it. 



FOREST TENT CATERPILLAR. 



(Clisiocampa sylvatica, Harris.) 



The Forest Tent Caterpillar hibernates in the egg state, 

 the larvae often emerging before the leaves on the tree are 

 out; but are able to fast from a week to ten days, and so 



