678 NEW YORK STATE MUSEUM 



dull red, '^ inch long-, each seynient except the last two with six rows of 

 hristle-tippecl spines, annulate with three fuscous hands. True legs black. 

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

 the mitldle sliading into an obscure color at the incisures. The spines are 

 gloss)' black with branches bearing apical white bristles. The two long 

 spines of the secontl ami third segments and the mesal one of the iith 

 about one fifth the h'ngth of the bod\', tlin-cted slightly forward antl 

 uneipiall)' forked. After the second molt the Iar\-a is "^ ,,> inch long, the 

 head dull retl with fuscous mesally ami lateralh'. The liotly is an umber 

 brown, lighter at the incisures, gray ilorsally and with a tlark vascular line. 

 Spines of second, third anil 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 iengtii of the thoracic spines, the lateral 

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

 tions and each l)earing a short, acute, fuscous spinule. After the fourth 

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

 conic and armed with stout spinules, anal i)lates with conspicuous whitish 

 granulations. 



The nearly full grown lar\'a is 3 to 4 inches long, green with a reddish 

 tinge on the back. The )ellowish black niarkeil head and anal shield, the 

 conspicuoLis spined yellowish tubercles and the prominent light spiracles 

 with their darker margins are all conspicuous featiu'es. This larva can 

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



The ])upa is dark mahogany brown, i to i '2 inches long and subcylin- 

 dric in form. 



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

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

 trees and construct cells in the ground ami 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 



