172 
mences its depredations at the latter end of May 
and beginning' of June. It is equal in multipli- 
city to any of its tribe already delineated, and 
proves so great and notorious a pest to the Brassica 
tribe, that without giving any farther details I 
have no doubt the kind will be clearly under- 
stood. I would add, that after it once makes 
its attacks it continues its depredations till severe 
weather retards it, providing it is not before re- 
pulsed by the various enemies to which it is liable 
to fall a prey. 
Tlie plants in the seed bed are very commonly 
infested by them, and at so early a stage of their 
growth, that the depredations these animals com- 
mit prove serious. Their existence, although there 
may only be few, will be discovered by the curl- 
ing of the leaves, and also by those parts of the 
leaves from whence they derive their support 
losing their green and exhibiting a light yellow. 
When the plant is at a more advanced state the 
edges of the leaf will most generally be found to 
roll up where they reside, the heart of the plant 
will also become crippled, and not extend freely. 
At a still more advanced stage these plants some- 
times become so infested, even when we expect 
produce, that the whole is entirely useless. An 
occurrence like this happened generally in the year 
1826; they reigned to that degree, I may ven- 
ture to say, that in most situations scai'cely a good 
Cauliflower was to be found throughout the whole 
season. 
