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.