122 MAIXE AGRICULTURAL EXPERIMENT STATION. 



expressive for New England and other northern states where the 

 insect is single brooded, appearing there during August and 

 September, while in more southern regions it is double brooded." 

 'i hough we have not traced this insect through its life history 

 in Maine, and cannot positively say that there are two broods, 

 yet the fact that the webs were conspicuous and the larvae fully 

 three-fourths of an mch long early in July, would indicate two 

 broods in western Maine. 



Description. 



Egg. — About one-sixth inch long, bright golden yellow, globular, orna- 

 mented with numerous regular pits, which, according to Packard, give 

 it, under the magnifying lens, the appearance of a beautiful golden 

 thimble. 



Larva. — Pale yellow when young, with two rows of black marks along 

 the body, a black head and sparse hairs. Full grown larva usually pale 

 yellowish or greenish with a broad, dark stripe along the back and a 

 yellowish stripe along the side, covered with whitish hairs that spring 

 from black and orange yellow warts. The caterpillars are somewhat 

 variable as to depth of color and marking, even on the same tree. The 

 fall brood is generally darker colored than the spring brood. 



Cocoon. — Thin, almost transparent, composed of a slight web of silk 

 intermixed with a few hairs from the caterpillar, or sometimes mixed 

 with sand when the cocoon is spun in the soil. 



Pupa. — Length .6 inch, breadth in the middle, .23 inch; dark brown, 

 smooth, polished, faintly punctuate, and bulged a little all around in the 

 middle. 



Perfect Insect. — A moth which varies greatly in size and color. These 

 color varieties have received different names by entomologists, but are 

 now reduced to H. cimea, Drury. The most common form is white or 

 slightly fulvous with white wings, but the wings show variations from 

 pure white to those profusely dotted with black and brown. Front thighs 

 tawny yellow, sometimes marked with a large black spot ; feet blackish ; 

 expanse of wings one and one-fourth to one and two-thirds inches. Male 

 moth usually smaller with the antennse doubly feathered beneath. The 

 antennae of the female possesses two rows of minute teeth. 



Life History. 

 The female deposits her eggs in clusters, laid in regular rows 

 or smaller irregular patches, on either side of the leaves, usually 

 near the end of a branch. Each female lays on an average about 

 five hundred eggs. Those for the first brood are deposited by 

 the last of May or during June, and the time required for them 

 to hatch depends upon the weather. Under favorable circum- 

 stances thev mature in about ten days, or those of the second 



