Interesting cases of predation of Opilo paliidus (OL.) and O. mollis (L.) (Col.: Cleridae) feeding on larvae of Exocentrus adspersus Muls. and Anaglyptus mysticus (L.) (Col.: Cerambycidae) are described. O. mollis is new for the Wzgórza Trzebnickie.
New localities of Leptura thoracica Creutz. in Białowieża Primeval Forest and Puszcza Borecka forest (NE Poland) with some other data on its geographic distribution, morphology, biology and taxonomie position are given. A key for determination of 6 species of Leptura L., which are likely to be found in Central Europe, is also provided.