576 Agricultural Experiment Station, Ithaca, N. Y. 



The above table shows that the adults have appeared in some 

 localities in August, but most of the records agree in giving Sep- 

 tember or October as the months when they are usually seen in 

 the fall. I'he fact that the moths hibernate, as*shown by Mr. 

 J)evereaux's captures during warm spells in winter at Clyde, 

 N. Y., explains the records of captures in March, April and May. 

 In some localities or seasons, perhaps all of the moths of this 

 species do not emerge in the fall, but hibernate as pupae. Our 

 breeding experiments, however, indicate that all emerge in the 

 fall, differing in this respect from X. laticinerea as will be shown 

 later. 



As was stated in the general discussion of the life-history of 

 these green fruit worms, doubtless egg-laying takes place early 

 in the spring, and the young caterpillars feed upon the buds and 

 leaves until May, when the fruit is large enough for them to eat. 

 The further life-history of this species follows closely the gen- 

 eral account just mentioned. 



The caterpillar of this species is figured, natural size, eating 

 the apple, on the right in the frontispiece, and twice natural size, 

 both lateral and dorsal views, at f and g, plate 1. It is of a light, 

 apple-green color, sometimes yellowish, with the head of nearly 

 the same color, and the venter darker. As the figures show, 

 the hair-bearing spots are white and very distinct. A narrow 

 mesal cream-colored stripe, slightly wider near the middle of 

 the body, extends along the dorsum; there is a slightly narrower, 

 but distinct subdorsal stripe of the same color that is somewhat 

 broken toward the extremities; there is also a wide, stigmatal, 

 cream-colored stripe, mostly below the spiracles, with its lower 

 or ventral edge sharply defined, but with its upper or dorsal edge 

 much indented with the body color and irregularly extending to 

 a. much broken, narrow, lateral stripe of cream-colored spots a 

 little above the spiracles. Most of these characteristic markings 

 are well shown in the figures at f and {/, plate 1. The caterpillars 

 spin a very thin cocoon of silk about themselves in their earthen 

 cell before they change to pupae. 



The brown pupa, shown enlarged at c, plate I, resembles in size 

 and general appearance that of X. laticinerea shown at c and d, 

 plate 2. But a close examination of the caudal end of the pupse 

 of these two species reveals striking differences. These are well 



