INSECTS INFESTING THE APPLE TREE. 77 



CHAPTER XXXI. 



The Yellow Canker Worm. (Cal.) 

 (Hibernia tiliaria — Harris.) 



The caterpillar (Fig. 40, Plate 1) of this species is about one 

 inch and three lines in length, and is provided with ten legs. 

 Color — body yellow, marked on the back with ten black lines, 

 which sometimes impart a bluish tinge to the ground color ; 

 under or ventral parts, yellowish-white ; head, yellowish- 

 brown. 



Pupa. — On entering the ground the caterpillar forms a cell, 

 which it lines with a few silken threads, thus forming a 

 cocoon. In from ten to fourteen days it changes to a pupa, in 

 which state it remains until the following Fall. 



IMAGO, OR PERFECT INSECT. 



Female Moth (Fig. 41, Plate 1) — Color, whitish, dotted with 

 black, and marked with two rows of black spots, and with a 

 row of smaller black spots on each side of the body ; the legs 

 are ringed with black and white ; the body is about half an 

 inch (six lines) in length. The eggs are deposited in crevices 

 and beneath the loose bark. Male moth (Fig. 42, Plate 1), 

 fore-wings yellowish, dotted with brown, and crossed by two 

 wavy brown lines, the line nearest the body being often indis- 

 tinct. In the space between these lines there is usually a brown 

 dot, placed nearest the front edge of the wing. The hind wdngs 

 are pale-yellowish, with usually a brown dot near the center of 

 each ; expands about one inch and nine lines. 



Use remedies as directed in Chapter XXXII — No. 10 or No. 

 89. (See note. Remedy No. 10). 



