306 Report of the Entomologists of the 



perceptible, its edges on each side indefinite.- The fringe is of the same color 

 with the wings, or slightly darker, and is tipped with whitish. The under side 

 is paler umber brown, the hind wings often gray, and both pairs are often 

 crossed by a narrow, dark brown band, which, on the hind wings, are curved 

 outside the middle. All back of this band, on both wings, is often paler, and 

 more so near the band." 



" The female is 1.75 inches wide, and in addition to the shortness of the 

 branches of her antennae, difTers from the male in her fore-wings, which are 

 proportionally narroAver and longer, with their hind margin cut off more ob- 

 liquely, and slightly wavy along its edge. Hence, also the dark brown lines 

 cross the wings more obliquclj', the hind one in particular forming a much 

 more acute angle with the outer margin. And all the wing back of this line 

 is sometimes paler or of a brownish, ashy color. And the fringe of these wings 

 has not the two whitish alternations which are often so conspicuous in the 

 male. The head and fore part of the thorax is cinnamon brown. The abdomen 

 is black, clothed with brown hairs, though very thinly so on the anterior part 

 of each segment, where these lines are intermingled with silvery gray scales." 



Varieties. — Two varieties of this species have been described. 

 ]N^umerous specimens of both were reared from the cocoons above 

 referred to. Thev are as follows: 



Variety sylvatica Harr. has the space between the lines filled 

 in forming a broad brown band across each anterior wing. Plate 

 XXV, third row; the two on the left are males and the third a 

 female. 



Varietv thoracicoides Neumoeffen and Dvar, has the bands 

 wanting or very obscure. Plate XXV, fourth row; all males. 



Among the specimens reared in the laboratory there was 

 an interesting series showing a gradual gradation from the light 

 typical form with the two well marked bands, to the variety 

 sylvatica having the space between filled in with bro%vn forming 

 the broad bands as above described. Plate XXV, fifth row. 



SUMMARY OF LIFE-HISTORT. 



In the latitude of Xew York State the eggs are usually laid 

 during the last week of June and until about the second week of 

 July. They are placed in bands extending around the twig and 

 are covered with a shining frothy glue. The caterpillars are fully 

 formed in the eggs before the summer is over, but do not escape 

 until early the following spring. They feed upon the foliage of a 



