296 



PESTS OF ORCHARD AND SMALL FRUITS 



forward on either side of its head, and a similar single pencil projecting 



back from the hind end. The caterpillars of the other two species are 



somewhat similar 

 in appearance, 

 though not so 

 brightly colored. 



The eggs of the 

 first species are 

 laid in a mass of 

 frothy, white sub- 

 stance, on top of 

 the cocoon of the 

 female, on the bark 

 of trunk or limb. 

 Fig. 440.— Egg-mass of the Rusty Tussock Moth. The eggs of the 



Original. others are not cov- 



ered with froth. The adult females are wingless, looking somewhat 



like gray spiders. They emerge and lay 



their eggs in late summer. 



The simplest means of control is to spray 



with arsenical poison, either Paris green 



or arsenate of lead. Egg masses may be 



destroyed when found by painting them 



with creosote. Sometimes trees are banded 



to prevent the insect from invading them 



from near-by uncared-for premises. 



The Fall Web worm ( Hijphantria cimea Dru.) 

 Colonies of hairy caterpillars feed in com- 

 pany on the foliage of orchard or forest 

 trees, building a web around the terminal 

 leaves. As the green leaves within their 

 nest are devoured, fresh foliage is drawn in 



and the nest enlarged, until it becomes f.g. 44l.-Th. Fall Web- 

 decidedly conspicuous. Several different worm. Original. 



