Description of a new species, Wallacea meijerei, from Sumatra, with additional data on W. albiseta De Meijere, Argyrobrithes separatus (De Meijere) and A. albopilosus (De Meijere), based on a study of the holotypes. Some data are also given on A. argentifer (Kertész). The paper contains furthermore a key to the oriental species of Wallacea Doleschall and Argyrobrithes.