We present faunistic data on two species new to Poland: Ptiliolum caledonicum (Sharp, 1872) and Baeocrara japonica (Matthews, 1885). Both species were found in the Mazury Lakeland in northeastern Poland. The latter species is regarded as an immigrant. Additionally, we confirm the presence of the rare Acrotrichis nana Strand, 1946 in Poland, previously only known from a single record from 2007. We provide further localities of this beetle in the Mazury Lakeland and the Mazovian Lowland in central Poland. Its dependence on dry biotopes is confirmed by specimens collected in old, dry, and fresh pine forests.