CATERPILLARS THAT FEED ON THE HOP- VINE. 41 



THE WHITE-MARKED TUSSOCK MOTH. 



{Orgyia leucostigma 8m. & Abb.) 



This omnivorous insect I found in some numbers on the bop; not 

 sufficiently numerous to attract the attention of growers, but suffi- 

 ciently abundant to form tbe nucleus from which future broods may 



spring; numerous enough to demand notice. The larva, when full- 

 grown, is from 1 to 1J inches in length, of a bright yellow color, spar- 

 ingly clothed at the sides with pale hair. There is a dusky stripe on 

 each si'de, and a darker or black stripe on the back : the head and two 

 little warts on the ninth and tenth rings are bright coral red ; there 

 are two tufts or pencils of long, black hair on the first segment, and a 

 single, similar tuft on the eleventh : the fourth, fifth, sixth, and 

 enth segments have each a thick brush of short, stout, yellow hair, giv- 

 ing the larva rather an odd but at the same time pretty appearance. 

 When full grown it spins a cocoon, and transforms into a whitish pupa. 

 The female moth, emerging from the pupa, isVingless, and never moves 

 further than the upper side of the cocoon from which she emerged. 

 The male is winged; the wings expand about 1 inch; are of a deep ash 

 gray, crossed by darker lines. The eggs are laid on the empty cocoon 

 of the female: are covered by a white, frothy matter which soon hard- 

 ens; and, when laid in the fall, do not hatch until the following spring. 

 These insects can be easily controlled. The cocoons and egg-masses 

 are attached either to the leaves, vines, or hop poles, or occasionally to 

 fences surrounding the yard. The vines are usually burnt when pick- 

 ing is over, and the e^^ masses on the vines are thus destroyed; the 

 poles should be examined either when stacked for the winter <>r when 

 set in the spring, ami the adhering egg-masses should be collected and 

 destroyed. Being white, they are easily seen, and as each egg-mass 

 contains the embryos of caterpillars enough to eat up all the vines on 

 a hill, the time employed in collecting it is not entirely wasted. During 

 the winter, or in early spring, the fences surrounding the yards should 

 be examined and the egg-masses picked off and destroyed. In this 

 way yards can be kepi free of this pest. 



Till: FALL WEB-WOBM. 



(tfpihsojna cunea Drory) 



In several yards 1 noticed the vines on a number o\' poles enveloped 

 by the web of tin 1 common Pall web-worm, so often seen on fruit trees. 

 There is no need to describe the insect, as it is SO well known, and there 

 is no need for hop-growers to suffer any loss from it, tor the whole 

 colony can be destroyed when first noticed by simply cutting off the 

 arms and leaves which are spun up and trampling ihem under foot. 



