DISEASES OF THE COTTON PLANT. ITS 
of the females, the worm being only about an inch in 
length. The first three segments of the body are whitish, 
marked with black hnes and spots ;. the segments where 
they join are brownish; the head is marked with wavy 
hnes of black on a white ground ; the rest of the body is 
of a dirty, blackish green. It has six pectoral feet, by 
means of which it moves from leaf to leaf, with its body 
and case, the latter either perpendicularly suspended in the 
air or dragged by the worm from behind. There are eight 
very small ventral and two anal feet, by means of which it 
clings to the inside of the case. The chrysahs measures 
about three-quarters of an inch in length, and contains the 
rudiments of wings, legs, head, and antennae, like other 
moths, and is of a dark brown. The perfect moth comes 
out in autumn, and measures across the expanded wings 
about an inch and three-twentieths. Its body is downy, 
and of a blackish brown ; tlie wings are semi-transparent, 
and scantily clothed with blackish scales, which are black- 
est on the margins and veins ; the antennae are covered at 
their tips, and are doubly feathered from the base to be- 
yond the middle. The female is much larger than the 
male, and never leaves her case, but changes into the per- 
fect insect in the shell of the ehrysaUs, and only emerges 
from it when the eggs are laid within. The young, after 
leaving their maternal case, in the spring, immediately 
commence their cases, aud spread over the native tree oi 
any others that may happen to stand near. 
These insects are a great nuisance wherever they once 
get established, as they are exceedingly prolific. One fe- 
male chrysalis case, which was dissected, contained seven 
hundred and ninety eggs, while others have been found to 
contain nearly a thousand. 
These pests are very rarely seen on the cotton plant, 
