EN
Formica lusatica SEIFERT, 1997 is an ant species not distinguished from F.cunicularia for years, only recently recognized as a good species. All specimens earlier reported in Poland as F. glauca RUZSKY, 1896 show no differences from F. lusatica. In this respect all F.glauca earlier reported in Poland should now be regarded as F. lusatica. New locations of this species in Poland are presented, all at the xerothermal grasslands of Upper Silesia, making it an ant species new for this region.