78 



INSECTS INFESTING THE APPLE TREE. 



CHAPTER XXXII. 



Fijr. 43. 



Spring Canker Worm. 



(Anisopteryx vernata — Peck. Paleacrita vernata — Riley.) 



The caterpillar of this species (Fig. 43a) is nearly one inch 

 in length, and is provided with ten legs. Color — body green- 

 ish, marked on each side with four Avhitish lines (Fig. 43c), 

 the two lowest further apart than the others ; head mottled 

 and pale on the top, and marked on the top with two pale 

 transverse lines. The larva, when young, is dark green or 

 brown, the head black. 



Fig. 43. — Spring Canker Worm ; a 



the worm — color, olive-green with 



paler stripes ; c, a side view, and d a 



back view of one segment of its body, 



enlarged ; h, an egg, enlarged ; a small 



cluster of the natural size to the right. 



Pupa. — On entering the ground the caterpillar 



forms a cell which it lines with a very few silken 



threads, thus forming a cocoon ; in a few days it 



changes to the pujni state (Fig. 44) in which it 



remains until the following Spring. 



Fig. 44. — Female pupa of Spring Canker Worm 

 enlarged — color, brown. 



IMAGO, OR PERFECT INSECT 



Female moth (Fig. Abb) — color, pale gray, marked on the 

 back with a black stripe, which is sometimes divided in the 

 center by a whitish line or a row of whitish dots ; legs ringed 

 with black and gray ; length of body, from four to six lines. 



Fig. 45. — Spring Can- 



rig.44. 



Fig. 45. 



ker Worm Moth ; a, the 

 male moth- color, brown- 

 ish-gray ; b, female moth 

 — c o 1 o r, pale-gray, a 

 darker stripe on the back ; 

 c, three joints of her 



