[ l l© ) 
experienced laff year, in attempting to breed the large garden 
•white Butterfly , Papilio Brofficer. Out of twenty Caterpillars 
taken from the Cabbage, eighteen were iking by this Infect, 
and died. In proportion then as the Infek’s enemies- are more 
or lefs numerous, fo may be the Infed itfelf. 
We ihall now proceed to give a ihort account of the hiftorv 
of the Infedt which is the fubjedt of this eflay ; in the courfe 
of which, we ihall point out what appears to us to be the belt 
and moil effectual method of deftroying them. The Cater¬ 
pillar, as already has been obferved, owes its origin to a Moth, 
called the Brown-tail Moth , which is about two-thirds of the 
fize of the Moth produced from the Silk-worm, and is of a 
white colour throughout, excepting a ffreak of brown on the 
under fide of each fore-wing, running near to, and parallel 
with, its anterior edge, and a brown or moufe-coloured tail, 
from whence it derives its name. Thefe Moths come out of 
Chryfalis about the beginning of July, at which time they 
may be found flying about {lowly, efpecially in the evening, 
and depofiting their eggs on the foliage of the trees and (hrubs 
before mentioned. The female has a much larger tuft of 
down on its tail than the male, a great part of which is made 
of their full growth arrives, the Caterpillar eats as-ufual, and appears equally 
well in health. That period arrived, which feldom happens till the Caterpillar 
has crept to fome convenient place to chryfalize in, they eat their way out of 
its body, and immediately fpiti themfelves fin all bags, or cafes, in which they 
change to Chryfalis. During this operation, which continues feveral days, 
the Caterpillar apparently fuffiars the greateft pain, and after ftruggling in vain 
with its mortal enemy dies. When the Ichneumon Fly is final], its maggots 
are proportionally numerous ; a hundred of them frequently proceed from one 
Caterpillar. 7 he little bags which they fpin to chryfalize in are frequently 
mi (taken by the ignorant for the eggs of the Caterpillar. 
ufe 
