DISEASES OF THE COTTON PLAOT. 
Should the moths of this cut-worm he like those of 
their congeners of the North, and attracted hy Ught, it 
might be well to use a lantern like that already de- 
scribed, or to ascertain the favorite substance upon which 
they feed, and poison them, as suggested in the case of the 
tobacco-fly. 
INSECTS FOUND ON THE LEAF. 
The Cotton-Louse. — {Aphis ?) 
When the cotton-plant is very young and tender it is 
particularly subject to the attacks of the cotton-louse, 
which, by means of its piercer, penetrates the outer coat- 
ing, or parenchyma, of the leaf or tender shoots, and sucks 
the sap from the wound. The under part of the leaves or 
young shoots are the places mostly selected, and the con- 
stant punctures and consequent drainage of sap enfeebles 
the plant and causes the leaf to curl up, turn yellow, and 
subsequently fall to the ground. The young lice are ex- 
tremely minute, and of a greenish color ; but when they 
become older, they are about a tenth of an inch in length, 
and often dark green; but in some instances they are 
almost black. It is conjectured that the color somewhat 
depends upon the health of the plant as well as that of the 
insect, or perhaps upon their food, as I have seen green 
and black lice promiscuously feeding upon the same plant. 
The female produces her young ahve throughout the sum- 
mer, when she may often be seen surrounded by her nu- 
merous progeny, sucking the juice from the leaves, and still 
producing young. Some naturalists state that the females, 
late in the fall, produce eggs for the generation of the next 
spring. If so, it is in order to preserve the species, as the 
