SOME INSECTS INJURIOUS TO ORCHARD FRUITS 561 



mass and covered with brown hairs from the tip of the female's 

 abdomen. They hatch in about three weeks and the young larvae 

 feed on the surface of the leaves, leaving only the brown skeletons, 

 so that badly infested trees turn brown in early fall. The cater- 

 pillars hatching from an egg mass feed together on adjoining 

 leaves, which they soon commence 

 to draw together with silken 

 threads, and by the first frosts they 

 have spun them into a tough 

 web. This is attached to the 

 twig by the old leaf stems, which 

 are bound to it by silk. The 

 web looks like a couple of dead 



FIG. 412. The brown-tail moth (Eu- 

 proctis chrysorrhcea Linn.): male above, 

 female below natural size. 



FIG. 413. Brown-tail moths 

 assembled on electric-light 

 pole, Maiden, Mass., July 

 12, 1905. (After Kirkland.) 



leaves from a distance, but the leaves are merely the outer covering, 

 and if the silk web be torn open, there will be found numerous 

 small pellets of silk each enclosing from three to twelve of the little 



