183 
No. 151.] 
when full grown. It varies considerably in its colors and marks, 
but is commonly of a pale yellowish or greenish hue, with a dusky 
stripe on each side of the back, running the whole length of its 
body. Above this, a narrower whitish stripe is more or less dis¬ 
tinct, and along the middle of the back is a slender dusky stripe, 
between the whitish ones. With a magnifying glass some black 
dots, regularly arranged, may be seen along the back and sides, 
each dot having a short hair growing from it. The, head is pol¬ 
ished, and of the yellow color of bees-wax. Some worms are met 
with, however, having black heads. Whether these are a dif¬ 
ferent species or not, can only be determined when the insect has 
attained its perfect state. They subsist upon the leaves, eating 
holes in them, and often devouring all except the coarse veins of 
the leaf. They also gnaw the young apples, causing them to wilt 
and fall from the tree. Our crop of apples for the present year 
is totally destroyed, and it is probable that many of the trees will 
die also, their foilage being wholly consumed, so that the trees 
look brown, as though they had been scorched by fire. When 
the tree is shook or jarred, many of the worms let themselves 
suddenly down from it, some to the ground, others suspended in 
the air by a fine thread like gossamer, which they spin. If it is 
menaced or annoyed when on the ground, with a wriggling mo¬ 
tion it runs backwards and forwards with surprising agility. 
This worm evidently belongs to the family of leaf-rolling moths, 
(Tortricid;e) ; and some of these worms may be seen hid in a 
slight covert which they form by folding the edge of the leaf, or 
folding it in a cylinder, or drawing two leaves together with their 
cobweb like threads. Most of the worms, however, do not at¬ 
tempt to form any such covering for their concealment. 
When the worm gets its growth, it crawls away from the tree, 
and under some leaf or other slight shelter on the surface of the 
ground, spins a little, oval, paper-like cocoon, of a gray color, 
about 18-1 OOths of an inch long, and a third as broad, within 
which it changes to a pupa. Analogy teaches ns that from this 
pupa will come a winged moth or miller, such as often llutters 
about our candles in the evening. This moth will lay its eggs 
upon the leaves or in the chinks of the bark of the apple tree; 
