124 MAIXE AGRICULTURAL EXPERIMENT STATION. 



Description. 



Eggs. — Pale yellow, oval and marked with a network of raised lines. 

 They can be distinguished from the eggs of the canker-worm by their 

 color and form. (See Report Maine Experiment Station, 1888, p. 167, 

 Fig. 20). 



Larva. — When full grown, about an inch and a quarter long; head dull 

 red with a V-shaped mark on the front; yellow above and marked with 

 many longitudinal black lines ; the under side paler. Like the larva, of 

 the canker worm, it is a span or inch-worm, but it is larger than the 

 caterpillar of that species. 



Female Moth. — Wingless, spider-like, yellowish white; sides marked 

 with black dots. Each ring of the body, excepting the last, which has 

 only one, bears two black dots. Head black in front; antennae thread- 

 like. Ovipositor jointed and retractile; legs ringed with black. The 

 larger size, the spotted back, and the black rings on the legs readily dis- 

 tinguish this from the wingless females of the fall and spring canker 

 worms. 



Male Aloth. — Expanse of fore wings an inch and a half; color rusty 

 buff, sprinkled with brownish dots and with two transverse, brown, wavy, 

 lines, the inner most distinct. Between the bands and near the anterior 

 edge is usually a brownish dot ; hind wings paler ; bod}'' color of fore 

 wings ; antennae feathered. Like most of the moths of the inch worms, 

 the wings are very delicate. The moths of the canker worm are on the 

 wing at the same time, but they are smaller and are thus readily dis- 

 tinguished. 



Life History. 



The eg-o-s, which are laid in situations similar to those of the 

 canker worm, hatch early in the spring and the young larvae feed 

 upon the foliage of the apple tree, basswood, elm, hickory, etc., 

 and when full grown, about the middle of June, they usually let 

 themselves down by a silken thread, enter the ground about five 

 or six inches and form a little oblong cell, within which they 

 change to the chrysalis state. In October or November (some- 

 times not until the following spring), the moths appear. The 

 wingless females climb the trees or other objects where they 

 meet the winged males, pair and soon deposit the eggs in clus- 

 ters, usually upon the branches of the trees they have infested, 

 completing the life history. 



Remedies. 



The life history of this species is so nearly like that of the 

 canker-worm that the remedies suggested for that insect are 

 applicable to this. It has never done as much damage as the 

 canker worm, but it is capable of doing much injury to the foli- 

 age of apple trees. 



