EN
513 specimens of Leiopus nebulosus s.l. originating from different European countries, mainly Poland have been analyzed. Among all specimens 403 belong to L. linnei Wallin, Nylander et Kvamme and 110 to L. nebulosus (L.); precise data concerning localities, including presentation of Polish localities on UTM maps have been included. Host plants of both species have been listed including new ones: Padus avium and Picea abies for L. nebulosus and Acer negundo, Aesculus hippocastanum, Alnus glutinosa, Carpinus betulus, Corylus avellana, Fagus sylvatica, Juglans regia, Malus domestica, Padus avium, Picea abies, Pinus sylvestris, Populus tremula, Rhus typhina, Salix caprea, Sorbus aucuparia, Ulmus leavis for L. linnei. Specimens of L. linnei from Poland are on average slightly bigger than those from Scandinavia. Leiopus nebulosus have been recorded as new for Poland, Austria and Ukraine; L. linnei for Lithuania, Belarus and Ukraine.