544 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



tered at the tip of a limb, it may be cut off and crushed. If this 

 and other caterpillars are abundant on the foliage in late sum- 

 mer, it will be well to spray with arsenate of lead, 3 pounds to 

 the barrel, while the caterpillars are small, which will be about 

 six to eight weeks after the apple blossoms fall 



The Red-humped Apple Caterpillar * 



This species is often associated with the preceding in very 

 similar injury, and has practically the same habits. The name 



is given on account of the prom- 

 inent hump on the fourth seg- 

 ment of the larva which, with 

 the head, is a bright coral red. 

 The mature caterpillar is striped 

 with yellowish-white, alternating 

 with dark brown or blackish 

 lines, and a double row of 

 black spines extends along the 

 back. The fore-wings of the 

 moth expand about 1J inches, 

 are dark brown on the inner 

 and grayish on the outer margin ; 

 they have a dark-brown dot 

 near the middle, a spot near 

 each angle, and several longi- 

 tudinal streaks of the same color 

 FIG. 477. The red-humped apple , , . . _, 



caterpillar (Schizura concinna along the posterior margin. Ine 

 S. & A.) slightly enlarged. hind-wings of the male are brown- 

 ish and of the female dusky brown, the body is light brown with 

 the thorax of a darker shade. 



This species occurs throughout the United States and feeds 

 on apple, plum, rose, thorn, cherry, blackberry, willow, oak, 

 hickory, and other trees and shrubs. The caterpillars become 

 full grown in late summer or early fall and then spin loose silken 

 cocoons to which are attached bits of earth and rubbish, so that 



* Schizura concinna Smith and Abbott. Family Notodontidce. See A. S. 

 Packard, Memoirs National Academy of Sciences, Vol. VII, p. 212; E.D. 

 Sanderson, Bulletin 139, N. H. Agr. Exp. Sta., p. 216. 



