* Lestodiplosis xylodiplosuga Skuhravá, 2001

(Figure 27 D)

Material: VE, Faerder: Mågerø, 59.15244°N 10.43216°E ± 10m, 20 September 2021, Quercus robur stumps with Xylodiplosis sp. L, leg. AF, coll. Private.

Biology and notes: The red, glabrous larvae are predators of gall midges of the genus Xylodiplosis . The females oviposit on freshly cut stumps of Fraxinus excelsior ( Oleaceae) and Quercus spp. ( Fagaceae). The larvae seek out larvae of the host, which develop in the xylem vessels in the wood, and attach themselves to them to suck nutrients. Attacked larvae die within hours (Skuhravá & Dengler 2001). Bi- or multivoltine. The larvae are active throughout the winter.

Distribution: Known only from Germany and Norway.