DISEASES OF THE COTTON PLANT. 209 
better reason, be suspected of having something more to 
do with the disease than the small beetles already men- 
tioned. But, even in this case, it would be well to inves- 
tigate further before coming to a definite conclusion. 
The Coen -Worm. — {Heliothes ? ) 
The caterpillar producing this small moth, described in 
the Agricultural Report for 1864 as injurious to the Indian 
corn in the Southern States, is likewise found in the bolls 
of cotton which have been split open by the rot, but can 
have nothing to do with producing the disease. It most 
probably feeds upon the seeds contained in the rotted 
bolls. 
The chrysalis is formed in a cocoon inside the boll ; it 
is about one-fifth of an inch in length, of a brown color, 
and formed in a cocoon of silk, interwoven with fsece^nd 
dust from the boll. 
The caterpillar is about three-tenths of an inch in 
length, of a reddish or pink color, with the head and part 
of the first segment brownish. It has six pectoral, eight 
ventral, and two anal feet, and is able to suspend itself by 
a thread, when disturbed. The body is slightly covered 
with a few short hairs. 
The moths appear in about fourteen days in warm 
weather, and, when expanded, measure nearly two-fiffchs 
of an inch ; the upper-wings are of a shaded chestnut 
brown, mottled with darker brown and black ; the tips of 
the wings are marked with dark spots ; the under-winga 
are very narrow, brown, and deeply fringed with fine hairs, 
presenting almost the appearance of feathers. The insect, 
when at rest, places the upper wings together, forming a 
ridge with the extremity turned up. There appear to be 
