Zygoseius Berlese 1916 is re-described, and Zygoseius furciger (Berlese) 1916 is re-described on the basis of the type specimens and additional material. Z. furciger has been collected in Argentina, U.S.A., Egypt, Israel, and South Africa. Z. badrii Hafez and Nasr, 1982 is a synonym of Z. furciger. Three new species are described: Z. sarcinulus sp. nov. from Australia, Z. ampullus sp. nov. from Argentina and Z. metoecus sp. nov. from Argentina. Zygoseius is provisionally considered to be a member of the family Pachylaelapidae, but its exact relationships are not fully resolved.