222 FEATHER-WING MOTHS. 
the worm spins a few silken threads on the under side of a 
leaf, or in some other sheltered spot, and having entangled 
its hind-legs firmly in this web of silk it sheds its hairy skin 
and becomes a pupa, which is a very odd looking affair, 
about four-tenths of an inch long, very angular and rugged, 
and most decidedly active if touched. It possesses on the 
middle of the back two rather long and compressed horns 
placed side by side, and extending upwards; other projecting 
points and ridges are also found. Its color is pale yellow- 
ish-green. After remaining in this condition for about two 
weeks it gives forth the perfect insect. Fig. 208 shows this 
insect in its different states. 
The moth, expanding about seven-tenths of an inch, is a 
very pretty insect; it has long and narrow fore-wings, cleft 
down the middle about half way to their base, the posterior 
half of the wing possesing a notch in the outer margin. 
Their color is yellowish-brown, with a metallic lustre and 
several dull whitish streaks and spots. The hind-wing is 
colored in a similar manner, and is divided into three lobes; 
the lower division is complete, extending to the base; the 
upper one not more than two-thirds of the distance. All 
margins of the wings, including those of the lobes, are 
bordered with a broad whitish fringe, sprinkled here and 
there with brown; the long and slender body is a little 
darker than the wings; the moderately long and thread-like 
antenne are nearly black, beautifully dotted with white 
throughout their whole length. The legs are long, alter- 
nately banded with yellowish-brown and white, the pos- 
terior ones ornamented with two pairs of diverging spines, 
which possess at their base a garter-like tuft of long brown 
scales. 
The moth produces but one annual generation, hence is 
not very difficult to keep in check by picking off the infested 
tips, or by crushing the caterpillars within the webbed 
leaves. | 
