28 
not sometimes vivipai’ous, and at other 'times ovip- 
arous, but never found at any time the ova, and it 
is probable that those who assert that they are pro- 
duced in the spring' from an egg may have form- 
ed a misconcejjtion by the eggs of other insects 
of the same genus, which are sometimes deposited 
in parts where those insects inadvertently choose 
for their residence. It is, however, certain that 
the latter brood retires in crevices and under 
rugged barks of the trees, or holes in the earth 
for protection, and remain torpid through the 
winter. I remember on my attendance to design 
the alterations of a gentleman’s pleasure grounds, 
on the 25th October, 1826, on a fine day, after a 
night of frost, seeing incalculable numbers of 
young ones assembled in groups on the tops of 
the espalier posts, as though they had been apprised 
of their danger, and had assembled to take into 
consideration the best steps to be taken to render 
them secure against the approaching winter. 
Those which survive the winter months resume 
feeding generally first on the trunk of the tree, 
as it mostly falls first in their way when leaving 
their concealments. Should only a few appear at 
first, so multifarious are they, that the trees which 
are occupied by them, will in a few weeks be 
completely overrun by their progeny. This species 
not only gives an unsightly appearance, but from 
continually drawing the sap out of the trunk and 
branches, tends greatly to injure the health of the 
tree. This frer|uently prevails to such a degree 
