70 EGGS, &c. OF ANTS. 
«It ought not,” says this exact and judi- 
cious observer, ‘‘to bepassed by in silence, 
thatthe egg which I found in the gall 
appeared to me considerably larger than 
the eggs of the same species, when they 
proceed from the body of the fly, or even 
when they are taken from the body of 
the impregnated or mother-fly, near the 
time of their being laid. ‘The whole of 
those I took from the abdomen of the 
flies I killed were remarkably small ; it 
therefore appeared certain, that the egg 
would have increased, and indeed had in- 
creased, in the gall. 
We are only in the habit of observing 
eggs surrounded by a covering incapable 
cences termed galls, which not only form the habit- 
ation, for a considerable period, of the infant insect, 
but serve it the whole time of its imprisonment for 
food. On examining the galls, some will be found 
to have an opening in them; these are they, from 
which the fly has escaped : others, that want this 
aperture, will be found to contain the insect, 
either in its larva, pupa, or imago state; for it ap- 
pears these several changes, at Icast with some of 
the species, take place within the body of the 
gall. — T. 
