NAKED WORMS EATING THE LEAVES 175 
The Cotton Worm (Alabama argillacea Hbn.) 
Dark greenish caterpillars, striped with black, eat the leaves and 
tender shoots of cotton, attack beginning in a small way early in 
the season, and increasing as 
additional generations of the 
pest are developed. When 
quite small, the caterpillars are 
light green, marked with dark 
spots, and eat only the under 
surface of the leaf, but they 
soon change to the coloring 
noted above, and their work 
is extended to include all of 4, 
the leaf tissue. 
The adult is a brownish moth expanding somewhat over an inch, and 
invades the Southern states, from Mexico, or points farther south. It 
. 201.— The Cotton Worm. Original. 
is abundant only at rare intervals. Eggs are laid on the leaves, and the 
pupal stage takes place ina folded 
leafon the plant. There are three 
to seven generations annually. 
The application of arsenicals 
to poison the worms is effective. 
The ordinary practice is to 
apply dry Paris green, dusting 
Fic. 202.— Adult of the Cotton Worm, 1% On the plants by means of 
Original. bags tacked to a pole. 
The Alfalfa Caterpillar (Eurymus eurytheme Boisd.) 
The leaves of alfalfa, and sometimes of other plants, are eaten by a 
dark green caterpillar, occasionally abundant enough to be destructive. 
The worm is naked, one inch long, has a white stripe down each side, 
obscurely broken by small red and black dots, and sometimes dark 
stripes down the middle of its back. 
The adult is a yellow butterfly, expanding about two inches, its wings 
