748 Report oF THE ENTOMOLOGIST OF THE 
the pupa state, but there seems to be no reason to doubt that the 
adults can hibernate in rubbish, or in the leaves of the cabbage 
left on the fields all winter, as part of these plants become par- 
tially covered in plowing and live over winter. 
Remedies. Catching the moths with a hand net has)been 
recommended, but it is entirely impractical. As already stated, 
the female moths are rarely seen; this is especially true in the 
spring. Light traps may prove practical, but there is no record 
of their being tried. With the exception of the above-named 
preventives the same remedies should be applied for Plusza as 
for the cabbage butterfly caterpillar. The application of these 
poisons must be more thorough and as strong as the plants will 
bear, because, if Plusia gets a particle of food that disagrees 
with him he travels to new feeding grounds. In the series 
of experiments with Paris green, London purple and “ Slug Shot,” 
used in a dry form (part of which are given in the article on 
cabbage butterfly), no results worth mentioning were obtained on 
Plusia, as the larvee would travel to parts of the plants where 
powders could not be applied. Better results were obtained by 
the use of Paris green and London purple, with water and lime 
although tests with these in the laboratory indicated that the 
killing properties of both were lessened by the lime. This was 
especially true with the London purple. 
Natura AGENCIES wHioH Assist IN THEIR DeEstTRUCTION. 
Parasites. A few chrysalids have been found the past fall 
at Jamaica N. Y., which appear to be infested by Pteromalus 
puparvum, but nothing has been bred from them, nor were any 
larve found that showed any indication of parasites. Curtis 
states that to his knowledge the Y-moth has no parasites.* 
Parasites have been bred from Plusia by Dr. Riley and Prof. 
Howard, and an egg parasite by Prof. Ashmead. These para- 
sites were obtained in the southern half of the United States. — 
Diseases. Prof. Osbornt mentions the occurrence of a disease 
on Plusia at Ames, Iowa, during the fall of 1892. This was the 
only check to this pest observed on Long Island the past fall. 
Sickly specimens were first noticed October 27 on cabbage. Later 
* Farm Insects, 1860, pp. 89-90. 
, ¥*U.8. Dept Agriculture, Div. of Ent., Bull. No. 30, 1893, p. 43. 

