in zoology, a genus of insects belonging to the order of aptera. It has 14 legs, bristly feelers, and an oval body. There are 15 species; of which the most remarkable are:

1. The entomon, or sea wood-louse, is white; eyes black; convex above, beneath flat, margin acute: Antennae 4: Four hind pair of legs largest, hairy. Body of 7 segments. Length 1½ line. Found on the coast. It accompanies the herring, and is an enemy well known to our fishermen: these insects will frequently eat up a whole fish while it hangs in the net.

2. Acellus, milipes, or wood-louse, is oval; the tail obtuse, with 2 undivided bristles: Various as to colour: Length, 5 lines. Their use in medicine is well known.