9.7 
brown colour, and its existence will be known 
from the downy or cotton-like appearance which 
at the time of feeding- transpires from the pores of 
its body ; so deceptive is this envelopment which 
conceals it, that one would not imagine that there 
was any living inhabitant. 
It appears from an account given by Sir J oseph 
Banks, that it was first introduced into this country 
about the year 1796 or 7 from South America, with 
some apple trees imported from that country. It 
was at first confined to the metropolis, but now 
prevails more or less all over the kingdom. It 
makes its appeai-ance early or late in the spring, 
according- to the severity or mildness of the wea- 
ther. In short, mild winters, in well sheltered 
gai'dens, some will be found to feed, and will 
become general upon the trunks of the trees, and 
proceed to attack the smaller branches as the wea- 
ther becomes less prejudicial to them ; there they 
will feed till about J uly, when the greatest portion 
of them leave the trees, and I believe enter the 
earth and perish. Some of the latter broods it is 
probable emigrate to other parts, but I believe not 
by the aid of wings, like others of the same genus ; 
for, after repeated investigations I have not found 
them at any time in a winged state, and therefore I 
conclude that they must pursue their natural coui-se 
on foot upon the surface of the ground. In course 
of the autumn months the trees again become nu- 
merously infested by them. I have not been less 
minute to ascertain whether or no these animals are 
c 2 
