Data to the Ephemeroptera, Odonata and Trichoptera fauna of the Kőszeg Mountains

We present occurrence records of 15 Ephemeroptera, 6 Odonata and 20 Trichoptera species from streams of the Kõszeg Mountains. The most significant species among several rare and endangered ones are Baetis melanonyx, B. niger, Ephemerella mucronata, Cordulegaster bidentatus, C. heros, Rhyacophila hirticornis and Potamophylax cingulatus