Genus Harpagoxenus HNS Forel, 1893
Harpagoxenus HNS Forel, 1893: 167.
Type-species: Myrmica sublaevis Nylander HNS , 1849.
Workers and queens. Head large, subrectangular with broad edentate mandibles. Both petiole and postpetiole have strongly developed ventral tooth-like projections. Palp formula 5:3. Antennae 11 segmented.
Male. Similar to Leptothorax acervorum HNS but with ventral projecting tooth on postpetiole as in female castes. Antennae 12 segmented.
This genus contains at most 2 or 3 palaearctic and 1 North American species living in semi-parasitic dulotic relationship with members of the closely related genus Leptothorax HNS