EN
The occurrence intensity of rose seed chalcid Megastigmus aculeatus (SWEDERUS, 1795) feeding in seeds of Rosa canina L. and Rosa rubiginosa L. was investi-gated in the Góry Pieprzowe reserve in 2003-2004. The investigations were performed on 6 randomly chosen localities in the Góry Pieprzowe reserve, Świętokrzyskie province (UTM: EB51). The investigated species is widespread in that region.