BEETLE-GALL. 131 
galls upon different plants. For example, several species 
of beetle are known to pass their earlier stages in 
swellings produced by the puncture of the parent insect. 
There is a little weevil of a greyish brown, which is 
mentioned by Mr. Rennie as forming a gall upon the 
hawthorn. 
“In May 1829, we found on a hawthorn at Lee, in 
Kent, the leaves at the extremity of a branch neatly 
folded up in a bundle, but not quite so closely as is 
usual in the case of leaf-rolling caterpillars. On opening 
them up, there was no caterpillar to be seen, the centre 
being occupied with a roundish, brown-coloured, woody 
substance, similar to some excrescences made by gall 
insects (Cynips). 
“Had we been aware of its real nature, we should 
have put it immediately under a glass, or in a box, till 
the contained insect had developed itself; but instead of 
this, we opened the ball, where we found a small yellow 
grub coiled up, and feeding on the exuding juices of the 
tree. As we could not replace the grub in its cell, part 
of the wall of which we had unfortunately broken, we 
put it in a small pasteboard-box with a fresh shoot of 
hawthorn, expecting that it might construct a fresh cell. 
This, however, it was probably incompetent to perform ; 
it did not, at least, make the attempt, and neither did it 
seem to feed on the fresh branch, keeping in preference 
to the ruins of its former cell. 
“To our great surprise, although it was thus exposed 
to the air, and deprived of a considerable portion of its 
nourishment, both from the fact of the cell having been 
broken off, and from the juices of the branch having 
been dried up, the insect went through its regular 
changes, and appeared in the form of a small greyish 
brown beetle of the weevil family. 
