The Cucujidæ constitute a small family of beetles of depressed, often elongate form, the antennæ lengthened in many species, giving them a somewhat characteristic appearance, which, while recalling the Cerambycidæ, renders them, nevertheless, easily recognized. They may be technically distinguished from the allied Clavicorn families by the long elytra, the five-jointed tarsi (the hind ones sometimes only four-jointed in the males), the rounded or oval anterior coxæ, the middle ones with externally open cavities and the posterior separate. The ventral segments are sub-equal in length. The larvæ, so far as known, are flattened grubs, with distinct antennæ and several ocelli; the terminal segments often with hooks or tubercles.