Contarinia tiliarum (Kieffer, 1890)

Material: AK, Baerum: Sandvika, 59.889952°N 10.527336°E ± 15m, 7 June 2021, on Tilia cordata, L, leg. HE, coll. NHMO; Oslo: Ellingsrud, Munkebekken, 59.932207°N 10.914771°E ± 10m, 30 June 2020, on Tilia x europaea, L, leg. HE, coll. NHMO; NSI, Vefsn: Mosjøen, Kippermoen, 65.832564°N 13.222950°E ± 10m, 27 July 2020, On Tilia x europaea, L, leg. HE, coll. NHMO .

Biology: The sulphur yellow larvae develop gregariously in roundish galls on the petioles of Tilia spp. ( Malvaceae), to a lesser degree also on the leaves and young stems. Univoltine; pupation and hibernation in the soil.

Distribution: Widespread in Europe including Norway, Sweden, Denmark and Finland. Eastern Russia and Japan.