ORDER IV.-——-MOTHS AND BUTTERFLIES. 175 
with a yellowish stripe on both sides; but when fully grown 
they are about one inch‘long, and vary in color, some being 
greenish-yellow, and others green, with small black spots 
upon the back. They are generally found in the most 
abundance upon apple-trees, but also devour the leaves, 
buds, and blossoms of plum, cherry, and other fruit trees, 
as well as those of many ornamental and shade trees. f 
The Canker-worm has but ten feet, and, on account of 
its difficult locomotion, is not much disposed to promenade, 
but, when not occupied at meals, lies stretched out upon a 
twig, like an Italian or Mexican enjoying the Dolce far 
niente—“ the luxury of doing nothing.’ About the middle 
of June, or when four weeks old, they usually descend from 
the tree either by slowly dragging their length along down 
the trunk, or more commonly by letting themselves down 
on their silken cord, like a rope-dancer, and enter the 
ground to the depth of several inches, there to metamorph- 
ose into cocoons. In the autumn they issue from the co- 
coon as perfect moths, the male of which is only provided 
with wings, of an ash color, which expand about one and 
a quarter inches. The female is wingless, and is obliged 
to perform her journey as well as she can on foot to the 
nearest tree, not one of her numerous male admirers being 
able to assist her. But in course of time she reaches the 
tree, climbs up its trunk and branches, and there deposits 
her eggs in clusters of a hundred or more, which she then 
fastens to the branch or twig with a firm covering of water- 
proof varnish. There the eggs remain, perfectly protected 
from the effects of rain and cold, until the ensuing spring, 
when the caterpillars are hatched. 
The Lime-TREE Span-worm (Hibernia tiliaria) is another 
kind of caterpillar, abundantly found in the month of June 
upon lime, poplar, elm, and apple trees, in almost all our 
parks, woods, and gardens. It is a little larger than the 
former, being, when full grown, one and a half inches long, 
