Macrodiplosis pustularis (Bremi, 1847)

(Figure 22)

Material: TEY, Nome: Ulefoss, Klovdal, 59.236580°N 9.378267°E ± 150m, 17 June 2019, L, leg. SH, BOLD: NHMO- ENT-548101,548103,548104, coll. NHMO; VE, Larvik: Stavern, Rakke, 58.980422°N 10.033271°E ± 5m, 18 June 2021, L, leg. HE & TS, coll. NHMO .

Biology: The larvae develop gregariously in leaf galls on Quercus spp. ( Fagaceae). Our records are from Quercus robur . The leaf lobes are folded downwards and often miscolored yellowish green. The larvae are initially white, later dirty orange, and have green gut content. Univoltine; pupation and hibernation in the soil.

Distribution: Widespread Palearctic, including Norway, Sweden, Denmark and Finland.