| abstract | The definition of the genera Archidispus Karafiat, 1959, and Imparipes Berlese, 1903, of the family Scutacaridae is revised mainly on the basis of the structure of claw I and its associated apparatus in the female. The conformation of the female leg IV currently used as discriminating characters between Archidispus and Imparipes is considered often unreliable and treated only complementally. Imparipes (Imparipes) intermissus Karafiat, 1959, and Imparipes (Archidispus) haarloevi Karafiat, 1959, are transferred to the genus Archidispus and the genus Imparipes in a strict sense, respectively. Five new species of Archidispus reltated to A. intermissus are described from Japan under the names of A. subintermissus, A. jezoensis, A. satoui, A. okumurai and A. difficilis. They are only known from adult females and found attached to the membrane between head and prothorax or that between pro- and mesothorax of ground beetles. Definition of the group of A. intermissus and a key to its component speies are presented. |