Contarinia rhamni (Rübsaamen, 1892)

(Figure 18 A–C)

Material: AAY, Tvedestrand: Risøya, 58.653734°N 9.150944°E ± 4m, 19 June 2021, on Frangula alnus, L1M leg. HE, coll. NHMO.

Biology and notes: The yellow larvae develop several together in galled flowers of Frangula spp. and Rhamnus spp. ( Rhamnaceae). Infected flowers are swollen and do not open. Univoltine; pupation and hibernation in the soil. In the galls from Risøya we also found the inquiline Dasineura frangulae Rübsaamen, 1917 (Figure 18 D).

Distribution: Known from several European countries including Norway and Denmark. European part of Russia.