The "Anobium." Of this beetle there are varieties, viz.: "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.