The paper introduces Lamprodila mirifica (Mulsant, 1855) as a beetle new for the Polish fauna. This is a monophagous species whose larvae develop under bark of branches and trunks of elms, preferably well insolated. It was recently found on the Wiekopolsko-Kujawska Lowland, in Krajkowo near Poznań – hitherto the only locality in Poland and the northernmost in Europe. A key to the identification of Polish species of Lamprodila Motschulsky, 1860 is provided.