Hoplothrips carpathicus PELIKÁN, 1961 was recorded for the first time in Poland in two localities: in the Białowieża National Park and in the Bieszczady National Park. It was captured using IBL2 screen traps at both sites. The diagnostic characteristics of the macropterous females found in Poland were compared with the micropterous holotype described in Slovakia. Key features are illustrated and data on the distribution of this species in Europe is appended

ABSTRACT. Studies on fungus-feeding thrips were carried out in two national parks ranked as biosphere reserves: the Białowieża National Park (north-east Poland) and the Bieszczady National Park (south-east Poland). IBL-2 screen traps were used as the main method in the forest communities. Traps were deployed in managed forests and the strict reserve in the Bialowieża NP, and along two trails in the lower forest belt up to its upper border with mountain meadows in the Bieszczady NP. Using IBL-2 traps revealed the presence of ten mycophagous species in the Białowieża NP and six in the Bieszczady NP. In the former Hoplothrips carpathicus, H. fungi, H. unicolor and H. polysticti, and in the latter H. carpathicus and Maderothrips longisetis were recorded for the first time in Poland.