Genus Harpagoxenus Forel, 1893 Harpagoxenus Forel, 1893: 167. Type-species: Myrmica sublaevis Nylander, 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 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

Published as part of Collingwood, C. A., 1979, The Formicidae (Hymenoptera) of Fennoscandia and Denmark., pp. 1-174 in Fauna Entomologica Scandinavica 8 on page 78