122 MAINE STATE COLLEGE 



spin their cocoons and remain in this state until the following 

 spring. The cocoons are frequently found in the orchard or 

 woods after the leaves have fallen, attached to the branches. 



This moth is considered in Saunder's Insects Injurious to 

 Fruits, p. 73, and all the stages figured. It is also considered in 

 Insects Injurious to Vegetation, Harris, pp. 385-388. 



THE WHITE-MARKED TUSSOCK-MOTH. 



Orgyia leucostigma, (Sm. & Abb.). 



During the past two years specimens of the above insect, in 

 the egg, larval and wingless female stages of its life history have 

 been received at the Station from various parts of the State. 

 Being apparently widely distributed and having attracted consid- 

 erable attention we give below an account of its habits. 



Eggs, three or four hundred in a mass attached to the empty 

 grayish cocoon previously occupied by the female moth. Egg 

 mass convex, smooth, grayish white ; composed of several layers 

 of eggs with a frothy, gelatinous material between them. 



Larva, when mature, over one inch long ; bright yellow ; head 

 and two small protuberances on the back carrot red ; back orna 

 mented with four cream colored brush like tufts ; two long black 

 plumes near the head and one near the posterior end of the body ; 

 sides clothed with yellow hairs ; brown or black stripe on the 

 back, and a dusky stripe on each side. See Figure 1. 



Fig. l. 

 Cocoon, gray, spun on the inside of a leaf. Texture loose and 

 the silk interwoven with numerous hairs from the caterpillar. 



