The beetles of this family are more characteristic of Southern latitudes than of cold climes like Canada; of about six hundred species known from America, north of Mexico, only ninety-six are recorded from the Provinces whch form the subject of the present paper. From all other families they may at once be known by the antennæ, terminating in a club composed of lamellæ or plates, which are capable of close opposition or of separation at the will of the insect.