* Contarinia coryli (Kaltenbach, 1859)

(Figure 16)

Material: AK, Oslo: Ellingsrudåsen, 59.936046°N 10.918250°E ± 20m, 25 October 2019, L, leg. HE, BOLD: NHMO-ENT-548018, coll. NHMO; Ellingsrud, 59.931476°N 10.910720°E ± 20m, 6 September 2020, L, leg. HE, coll. NHMO; 59.935982°N 10.918300°E ± 30m, 10 September 2020, LMF, leg. HE, coll. NHMO.

Biology: The white larvae develop in the autumn in male catkins of Corylus spp. ( Betulaceae). Our records are all from Corylus avellana . Infected catkins become swollen and disfigured, and the scales turn brown at their bases. Univoltine; pupation and hibernation in the soil.

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