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