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 
Fic. 440.— Egg-mass of the Rusty Tussock Moth. 
Original. 
somewhat similar 
in appearance, 
though not so 
brightly colored. 
The eggs of the 
first species are 
frothy, white sub- 
stance, on top of 
the cocoon of the 
female, on the bark 
of trunk or limb. 
The eggs of the 
others are not cov- 
ered with froth. The adult females are wingless, looking somewhat 
like gray spiders. 
their eggs in late summer. 
They emerge and lay 
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 Webworm ( Hyphantria cunea 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 
decidedly conspicuous. Several different 
Fic. 441.—The Fall Web- 
worm. Original. 
