678 NEW YORK STATE MUSEUM 



dull red, % inch long, each segment except the last two with six rows cff 

 bristle-tipped spines, annulate with three fuscous bands. True legs black. 

 After the first molt the head is a shining red and the segments reddish in 

 the middle shading into an obscure color at the incisures. The spines are 

 glossy black with branches bearing apical white bristles. The two long 

 spines of the second and third segments and the mesal one of the 11th 

 about one fifth the length of the body, directed slightly forward and 

 unequally forked. After the second molt the larva is s / IO inch long, the 

 head dull red with fuscous mesally and laterally. The body is an umber 

 brown, lighter at the incisures, gray dorsally and with a dark vascular line. 

 Spines of second, third and eleventh segments curved, glossy black with 

 yellowish base. The caterpillar after the third molt may be recognized by 

 the long white hairs arising from the central portions of the segments, the 

 dorsal ones being nearly twice the length of the thoracic spines, the lateral 

 ones shorter. These spines are honey-yellow studded with conical projec- 

 tions and each bearing a short, acute, fuscous spinule. After the fourth 

 molt the larva is i3^ inches long and the heretofore cylindric spines are 

 conic and armed with stout spinules, anal plates with conspicuous whitish 

 granulations. 



The nearly full grown larva is 3 to 4 inches long, green with a reddish 

 tinge on the back. The yellowish black marked head and anal shield, the 

 conspicuous spined yellowish tubercles and the prominent light spiracles 

 with their darker margins are all conspicuous features. This larva can 

 easily be recognized by reference to plate 19, figure 1. 



The pupa is dark mahogany brown, 1 to 1^ inches long and subcylin- 

 dric in form. 



Life history. The moths fly in June and deposit eggs, producing cater- 

 pillars which attain maturity in September, at which time they forsake the 

 trees and construct cells in the ground and change to pupae, in which 

 condition the winter is passed. 



This caterpillar has a wide range of food plants. It has been recorded 

 from 52 species representing 15 natural orders. The white pine appears to 



