INSECTS INFESTING THE APPLE TREE. 



87 



La Baron. The young Avorms are of a pale yellow color, with 

 black heads. When fully grown they are a trifle over an' inch 

 long ; of a yellowish or bluish-gray color, the back usually 

 black ; the body is sparingly clothed with whitish, reddish or 

 mouse-colored hairs, which groM- in clusters from warts which 

 are usually yellowish-brown, or the tAVo rows on the back are 

 frequently black, or reddish-brown marked with black. When 

 fully grown these caterpillars descend to the ground, which 

 they enter, and form small cells in which to pass the pupa 

 state (Fig. 576). They spend the Winter in this latter state, 

 and the moths (Fig. 57c), which issue the following Spring, 

 expand about an inch and three lines and are of a pure white 

 color and without spots, except on the legs. " The proper 

 time to destroy these caterpillars is while they are young ; at 

 such time the branch containing the nest can be removed and 

 its contents easily destroyed." — Riley. 

 Remedy. — Use No. 97. 



CHAPTER XXXVII. 



The Tussock Moth. (Cal.) 



(Orgyia leucostigma — Abbot and Smith.) 



Order, Lepidoptera ; Family, Bombycid^e. 



[Feeding upon the leaves of the apple and various other 

 trees ; a black and yellow caterpillar having large bunches 

 and plumes of hair on its body.] 



The pretty caterpillar of this moth (Fig. 58) is found on 

 the apple, pear, plum and horse-chestnut ; also on the walnut 

 and oak, and perennials in the flower garden, especiall}^ the 

 rose. 



Fig. 58. — Cater- 

 pillar of Tussock 

 Moth — colors, yel- 

 low and black, or 

 brown ; hair white, 

 the pencils blackish. 



When full grown 

 it measures from one 

 inch and three lines to one inch and six lines in length. Color, 



Fig. 58. 



