Insects Injurious to the Potato ani^ Apple. 587 



the eggs they begin to spin threads of silk from the mouth, 

 and begin to form a web. A large number of them live 

 and work and eat together and the tent increases in 

 size with the growth of the worms. They wander about the 

 tree, eating its leaves, during the day and retire to the 

 tent at night or in bad weather. The larva (fig. T, a, b,) is 

 about two inches long when full grown ; its head is black, 

 there is a light line along the back, and the sides are striped 

 with dark lines on a yellow ground, and the body is covered 

 with scattered hairs. They live in the larval state for five 

 or six weeks, leaving the web or tent in the forenoon and 

 returning to it, and again in the afternoon, for food. After 

 they have reached their full growth they scatter over the 

 tree seeking for hiding places where they may spin the 

 cocoon and pass the chrysalis state, in which they remain for 

 about three weeks, at the end of which they come forth as 

 perfect moths. 



Fig. 8. 



TENT CATERPILLAR— CLISIOCAMPA AMERICANA, Harris, 



MOTH. 



These (fig. 8,) are one and one-tourth to one and one- 

 half inches across the expanded wings ; they are of a red- 

 dish brown color with a broad transverse band of a lighter 

 shade crossing the middle of each of the fore wings, on each 

 side of which is a cream-colored line. Various eflicacious 

 remedies against the ravages of this moth are known. 



