New York AGRICULTURAL EXPERIMENT STATION. 749 
it was found in several localities very virulent on larvee feeding on 
lettuce, especially in cold frames. The first outward symptoms of 
the disease is the yellowish appearance of the larvae. At death 
they are ashy grey. In addition to the color they are firmly fast- 
ened by the prolegs and hang with head downward. They soon 
change to a dirty putrid mass the same as the cabbage caterpillar 
when affected with the bacterial disease. But instead of thriving 
during warm weather like the disease of the cabbage worm, this 
later disease did not appear until the cold wet weather of October 
and November set in. 
Conclusions. First. The cabbage moth did more damage to 
late cabbage on Long Island in 1894 than the cabbage butterfly. 
It is liable to ruin late crops of lettuce, especially transplanted 
crops. 
Second. Apparently it is three-brooded on Long Island, and 
probably hibernates both in the adult and pupa stages. 
Third. Paris green mixed with lime water is the surest remedy 
for it. 
Fourth. It has but few natural enemies on Long Island, but is 
attacked late in the fall by a virulent disease. 
REFERENCES To FurtrHEeR LITERATURE. 
Riley: Second Report Insects of Mo., 1870, pp. 110-112. 
Riley : Bull. No. 6, U. S. Ent. Commission, General Index and 
Supplement to the Nine Mo. Reports (1881), pp. 77, 78. 
Packard: Report Rocky Mt. Locusts and other Insects, Dept. 
Interior U. 8. Geol. Survey, 1877, pp. 752, 753. 
French: Seventh Report State Entomologist, C. Thomas, Ill. 
1878, pp. 229, 230. 
Thomas: Ninth Report State Entomologist, Ill., 1880, pp. 40-45. 
Lintner: Second Annual Report, Injurious and other Insects of 
N. Y., 1885, pp. 90-93. 
THE CABBAGE PLUTELLA. 
Plutella cruciferarum, ZR... 
ot (Ord. Leripoprera: Fam. Tre.) 
This moth has been described under the following names: 
“The Web Moth,” “ The Cabbage Leaf-Miner,” “The Diamond- 
back Turnip Moth,” “The Diamond-back Cabbage Moth,” “The 
