INSECTS INJURIOUS TO THE APPLE AND PEAR 



615 



oak, walnut, chestnut and other shade and forest trees, some- 

 times defoliating them, as do other nearly related species. 



Control. As the work of these caterpillars is soon noticed, 

 and as they habitually feed in colonies, it is an easy matter to 

 hand pick and destroy them, or swab them off the limbs with a 

 rag or waste saturated with kerosene, or where a colony is clustered 

 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 summer, 

 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 prominent hump on the 

 fourth segment of the larva, 

 which with the head is a bright 

 coral red. The mature cater- 

 pillar is striped with yellowish- 

 white, alternating with dark 

 brown or blackish lines, and a 

 double row of black spines ex- 

 tends along the back. The fore- 

 wings of the moth expand about 

 1^ inches, ire 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 longitudinal streaks 

 of the samo color along the 

 posterior margin. The hind- 



* Schizura concinna Smith and Abbott. Family Notodontidae. 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. 



FIG. 470. The red-humped apple 

 caterpillar (Schizura concinna 

 S. & A.) slightly enlarged. 



