:
"A. pertinax," "A. eruditus," and "A. paniceum." In the larval
state they are grubs, just like those found, in nuts; in this stage
they are too much alike to be distinguished from one another.
They feed on old dry wood, and often infest bookcases and shelves.
They eat the wooden boards of old books, and so pass into the paper
where they make long holes quite round, except when they work
in a slanting direction, when the holes appear to be oblong.
They will thus pierce through several volumes in succession,
Peignot, the well-known bibliographer, having found 27 volumes
so pierced in a straight line by one worm, a miracle of gluttony,
the story of which, for myself, I receive "_cum grano salis_."
After a certain time the larva changes into a pupa, and then
emerges as a small brown beetle.
2. "Oecophora."--This larva is similar in size to that of Anobium,
but can be distinguished at once by having legs. It is a caterpillar,
with six legs upon its thorax and eight sucker-like protuberances
on its body, like a silk-worm. It changes into a chrysalis,
and then assumes its perfect shape as a small brown moth.
The species that attacks books is the OEcophora pseudospretella.
It loves damp and warmth, and eats any fibrous material.
This caterpillar is quite unlike any garden species, and, excepting
the legs, is very similar in appearance and size to the Anobium.
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