90 INSECTS INFESTING THE APPLE TREE. 



upon the leaves of the apple tree are usually of a black color, 

 the top of the first segment yellow, and there are five yellowish 

 lines on each side of the body, while those infesting the black 

 walnut are destitute of the 3'ellow stripes, and the top of the 

 first segment is black ; in both of these varieties the head is 

 black. 



When fully grown (Fig. G3a ) they measure about two inches 

 in length ; they then descend to the ground, which they enter 

 a short distance, where each one forms a cell in which to pass 

 the pupa state, which continues throughout the Winter. Only 

 one brood is usually produced each year. 



The wings of the moth (Fig. 68/j) exjDand nearly two inches, 

 and are of a reddish brown color, crossed by four transverse 

 lines of a darker brown : the liind wings are of a lighter color, 

 and are unmarked. The moths from the caterpillars which 

 infest the black walnut, are more of a smoky brown color. 

 Owing to the • fact that these caterpillars congregate in large 

 companies upon a single branch, the latter can be easily 

 removed from the tree, and the caterpillars can then easily be 

 destroyed. 



Remedy. — Use Xo. 1)7. 



CHAPTER XXXrX. 



The Red-humped Caterpillar. (Cal.) 



(XotodiDita coiicliiitn — Smith. ) 

 Order, Lepidoi^tera ; Family, Bo.MinciD.K. 



[Feeding in communities ujion the leaves of the cherry, 

 apple, plum, and pear; a striped caterpillar, having two rows 

 of black spines along the back]. 



These cateri)illars live in large companies, and when at rest 

 they elevate the hind part of the body. They are of a reddish 

 color, and are striped lengthwise with yellow and white lines ; on 

 the fourth segment is a coral-red hump, on which are four black 

 spines ; scattered over the body are numerous black spines or 

 points, those on the back the largest ; head, coral-red. When 



