New York Agricultural Experiment Station. 381 



TWO OTHER TENT CATERPILLARS. 



As previously stated on page 365 there are two other species of 

 tent caterpillars common in the east; these are the forest tent 

 caterpillar, Clisiocampa disstria Hubn., and the fall web worm, 

 Hyphantria cunea Dr. 



THE FOREST-TENT CATERPILLAR 



This species is closely related to the apple tree tent caterpillar 

 and is undoubtedly often confounded with it. As its name indi- 

 cates, however, it feeds principally upon the leaves of forest trees 

 of which the maple seems to be its favorite. But it also feeds 

 readily upon various species of fruit trees, aad was quite common 

 in the apple orchards last year, often feeding in company with the 

 apple tree tent caterpillar. 



The habits of the two species are quite similar. The egg 

 masses of the forest tent caterpillar are placed in a similar man- 

 ner, but can be readily distinguished, as they are of nearly uni- 

 form diameter and are cut off more abruptly at the ends. The 

 young caterpillars appear at about the same time in the spring and 

 at first resemble their near relatives quite closely. But they soon 

 begin to show a difference in markings, and when full grown can 

 be readily distinguished by the dorsal row of white diamond 

 shaped spots in place of the unbroken white line characteristic of 

 the other species. 



The web of this species is delicate and inconspicuous. In 

 many cases there appears to be no web at all. The adults are 

 easily distinguished by the oblique lines on the fore wings which 

 are dark in color instead of light, as with the foregoing species. 

 The space between the lines is also usually darker. 



THE FALL WEB WORM. 



The webs of this species are frequently conspicuous in the fall 

 upon forest and fruit trees. Of the fruit trees it seems to prefer 

 the apple. The eggs are placed upon the leaves and the cater- 



