92 INSECTS AFFECTING THE STRAWBERRY. 



is not desirable, the insects of the second brood may 

 be destined by spraying or dusting the plants in 

 August with some poisonous insecticide. 



The Strawberry Slug. 



Ernphytus maculatus. 

 The transformations of this insect have been well 

 represented by Dr. Riley at Fig. 39. The four-winged 

 fly (3) appears in spring, and deposits its eggs within 

 the tissues of the leaf or stem. The larvae hatch in 

 a short time, and feed upon the leaf, gnawing small, 

 circular holes at first, like those eaten out of currant 



Fig. 39. Strawberry Slug: 1, 2, pupa; 3, 5, fly; 4, 6, 

 larva; 7, cocoou; 9, egg, magnified. 



and gooseberry leaves by young Currant Worms. 

 They develop in five or six weeks into pale-green 

 worms {If., 6) about three-fourths of an inch long. 

 The larva? now go slightly beneath the surface, where 

 they form cocoons (7) within which they change" to 



