2025, Mazur, Andrzej, Witkowski, Radosław

2025, Łabędzki, Andrzej, Mazur, Andrzej, Witkowski, Radosław, Klejdysz ,Tomasz

Jewel beetle wood wasp (Orussus abietinus) is a member of the parasitic wood wasps family (Orussidae), a hymenopteran insectsbelonging to the sawflies (Symphyta) sub-order. Until recently, it was the only species representing the family in Poland. In the last few years, two more species have been found – Orussus unicolor Latreille, 1812 and Pseudoryssus henschii (Mocsáry, 1910). Orussidae are the only family among herbivores sawflies whose representatives have a parasitic behavior and are parasitoids of other insects mainly those considered technical pests of wood, thus being natural enemies of pests they can be a limiting factor in the damage caused by cambio- and xylobionts. Orussus abietinus was reported rarely from Poland in the last century and only in the last two decades has itbecome decidedly more numerous. In addition, the recent finding of more two species of the family may indicate that the changingclimate in Poland may serve the members of the Orussidae, and it prefers warm habitats and sunny sites. This paper presents new loca­lities of O. abietinus in Drawa National Park found in 2024 during studies of tree-associated entomofauna.