BUTTERFLIES OF MAINE. 5L 
between them. Duration of this stage, four or five days. 
The larva passes four molts before maturity, and is then one 
inch long, armed with seven rows of long, tapering spines ; 
one along the middle of the back, from the third to the 
twelfth segment, inclusive, and three along each side; the 
upper row on each side running from the third to the twelfth 
segment; the next row from the third to the thirteenth, but 
the spine on the fourth, is below the row and in line with the 
spiracles ; the lower row extends from the fifth to the twelfth 
segment. <A little below the summit of each spine, from 
three to five branches start out, each branch and spine ending 
in a bristle. The color varies greatly ; some are black with, 
yellow bases to the spines and a yellow lateral line; others. 
are nearly white, with red spots along the sides. 
The pupa is about four-fifths of an inch long, of various. 
shades of gray or brown, with golden protuberances on the- 
abdomen, and a flattened prominence on the back. 
The larva of this species feeds on hop, nettle, false nettle: 
and elm; and after the second molt, they conceal themselves . 
among the leaves drawn together with silk. There are two. 
broods in a year; the last one hibernates in the perfect state, 
and the females revive in the spring and lay their eggs for. 
the next brood. The form which appears in the fall, and: 
hibernates during the winter is called harrisi7, and is the one - 
described above. The next generation is the form called! 
dryas, and differs from the above in having the upper side of» 
the hind wings nearly black. 
This species has been taken in Orono, on, the. tenth. of: 
August. 
