EN
Authors give the first record of Berosus geminus REICHE et SAULCY, 1856 in Poland (Gotówka near Chełm, 51°10’15,9” N, 23°33’32,3” E, dystrophic water body, 29 IV 2008, 2), describe the study site and co-occurring species. The new study site moves the boundary of the range of B. geminus in central-eastern Europe ca. 500 km towards the northern-east. However, the gap of ca. 2000 km between already known study sites of B. geminus in central and southern Europe (ca. 40 study sites) and locus typicus situated in Caucasus needs to be investigated. The paper also includes a completed and revised key to species from the genus Berosus occurring or possible to find in Poland.