A genus of small ground dwelling ants. The majority of records are from green-houses or other permantly heated buildings. Outdoor records are usually from piles of rotting or fermanting matter. There are known to be three species present in the British Isles but very similar morphology makes determining specimens to species difficult.. The best known is H. punctatissama iso Seifert, 2013 with scattered records across all areas; H. ergatandria iso Seifert, 2013 only recently split from H. punctatissama and H. eduardi a tramp species with very few records.