29 
that there is not a sufficiency of sap to send forth 
any young shoots at all. I remember being asked 
if I did not think that those little knots contained 
the eggs of the Bug. The question may appeal' 
to some very ridiculous, but probably it may not 
appear so much so when we consider similar 
cases. The little lumps on leaves, branches, and 
bulbous roots, commonly called galls, ai'e actually 
inhabited by living animals. But in the case in 
question these knots are excrescences caused or 
produced by nature in repairing the damages done 
by these animals lacerating while labouring for 
their support. 
Apples, and various sorts of Crabs, appear 
to be the only sort of trees or plants they inhabit. 
Mr. Salisbury represents the larvae as feeding- 
on the roots. I have never found them there, 
though I have frequently searched for them. There 
is a species (the larvae) of the same genus which 
often attacks the roots of various trees and plants, 
and which also transpires a similar substance to that 
of the Aphis Lanegera, which may possibly have 
been taken for it. Harrison also speaks of their 
feeding- upon the roots, and furnishes a plan for 
their destruction while in that situation. Mr. 
Salisbury also gives a representation of the 
winged or perfect insect, which he supposes to 
be the male. This I would not presume to dis- 
pute, although there must only be few in this 
state, or otherwise 1 luive strangely mismanaged 
my investigations. 
