New York Agricultural Experiment Station. 375 



the outer margin of the wing. In some females these stripes are placed 

 nearer to each other; and though commonly parallel, in some instances 

 from the middle of the wing to the outer margin, or even through their 

 entire length, they diverge from each other. In the males they are less 

 varfable, but the space between them in this sex is frequently pale gray 

 and there are also numerous gray hairs on the basal portion, and a few 

 toward the apical margin also. The hind wings are of the same color 

 as the anterior ones, but without any pale marks. On their under sides 

 the wings are the same color as above, and commonly a white band ex- 

 tends across both pairs near their middle, that on the fore wings being 

 straight, and widened at the outer end, that on the hind wings broader 

 and curved. The fringe on the fore wings has a white alternation near 

 the outer angle and another broader one on the middle; along the inner 

 angle and on the hind wings it is white, slightly varied in places with 

 dull reddish. These colors of the fringe are much more distinct in the 

 darker colored varieties of the male. The hairs with which the thorax is 

 densely coated are often grayish. The stalk on the antenna is dull white 

 and its branches are dark, dusky red, sometimes with a whitish line on 

 their outer side. The feet are white or yellowish white, particularly in 

 the males. The wings, when spread, measure from 1.20 to 1.30 inches in 

 the males, and in the females 1.40 to 2 inches. 



During the first week or ten days of July most of these adults 

 have emerged and hence it is during this time that they are most 

 numerous. They are not usually seen, however, as their habits 

 are nocturnal. The eggs are deposited very soon after the moths 

 take flight. Plate XXXIV, Figs 1 and 2, show the moths with 

 wings at rest, Figs. 3 and 4 with wings spread, all natural size. 



SUMMARY OF LIFE HISTORY. 



There is but one brood annually. The eggs are laid early in 

 July. The caterpillars are fully formed in the eggs by early 

 November. They leave the eggs about the middle of the follow- 

 ing April. Soon after hatching the caterpillars from each mass 

 of eggs begin to build a silken tent, usually in the forks of some 

 of the smaller limbs, in which they remain except while feeding. 

 They feed upon the leaves and are full grown and ready to pupate 

 late in May or early in June. The moths emerge during June or 

 early in July. The time for these changes varies according to 

 the season. 



