47 
luxuriance and health far exceeding- those neg- 
lected, but the above insect enjoys the healthy 
plant as much as those of a more delicate nature, 
and therefore the number of insects is still the 
same ; and the only advantage derived by regi- 
men is, that it affords a greater share of vege- 
tation for consumption, and must require a greater 
number of consumers. 
Another very remarkable sort of Caterpillar 
which frequently and numerously attacks the leaves 
of the Apple, as soon as they are pretty well ex- 
panded, is furnished with a kind of tent, ma- 
nufactured of materials produced by itself; and 
apparently it is a very good house or tent 
keeper, for I never found it at any time absent ; 
indeed I believe it never ventures out of doors 
farther than about half the length of its body, 
when moving its tent, till it arrives at a winged 
or perfect state ; but at all times when it has occa- 
sion to move for a fresh supply of food, it artfully 
moves its tent, which, at this period, is but small, 
but proportionable to its size. It is increased in 
extent accordant with its inmate, to the dimen- 
sions of about tlii-ee parts of an inch long-. It 
has a brownish appearance or colour, and is of a 
cylindi’ical foi-m, and is placed nearly perpendi- 
cular-, in which manner it is supported by silken 
cables, which the little engineer manufactures as 
well as fixes in such a manner as to support it in 
the above upright manner, and which it lets loose 
