24 



After reaching their full growth, they leave tlieir tents and scatter 

 in all directions, seeking for some protected place where each one 

 spins its spindle shaped cocoon of whitish silk intermingled with 

 sulphur colored powder, Fig. 15, d. They remain in these cocoons, 

 where they have changed to pupae, from twenty to twenty-five days, 

 after which the moths emerge, pair, and the females lay their eggs 

 for another brood. 



Several remedies have been suggested, a few of which are given 

 below. Search the trees carefully, when they are bare, for clusters of 

 eggs ; and, when found, cut off the twigs to which they are attached, 

 and burn them. 



As soon as any tents are observed in the orchard they should be 

 destroyed, which may be readily and effectually done by climbing the 

 trees, and with the hand protected by a mitten or glove, seize the 

 tent and crush it with its entire contents ; also swab them down with 

 strong soap-suds or other substances ; or tear them down with a 

 rounded bottle-brush. 



Burning with a torch not only destioys the caterpillars but injures 

 the trees. 



It should be observed, how^ever, since the caterpillars are quite 

 regular in taking their meals, in the middle of the forenooa and after- 

 noon, that they should be destroyed only in the morning or evening 

 when all are in the tent. 



Another remedy is to shower the trees with Paris green in water 

 in the proportion of one pound to one hundred and fifty gallons of 

 water. 



THE FOREST TENT-CATERPILLAR. 



CUsiocampa disstria (Hiibiier.) 



Fig. 17. 



This species, commonly known as the Forest Tent-Caterpillar, 



