The species belonging to this sub-tribe, although small in number, rank with the rarer forms of Carabidæ : they may easily he known by their glabrous body and the confluent eighth and ninth striæ of the elytra. Several of the Oodii bear a superficial resemblance to certain Amara allied to fallx. With one exception ( O. elegans) the species are all Atlantic, occurring more abundantly southward. Oades fluvialis must be considered a typical northern Species, occurring rarely near St. Louis, Mo., but more abundent at Rock Island, Ill.