Iteomyia major (Kieffer, 1898)

(Figure 39 C–D)

Material: NSI, Saltdal: Saltdalen, Dalmo, 66.873827°N 15.293076°E ± 50m, 16 July 2020, on Salix myrsinifolia, L, leg. HE, coll. NHMO; NSY, Gildeskål: Breivika, Breivikdalen, 66.997495°N 14.278931°E ± 4m, 22 July 2020, on Salix lanata, L, leg. HE, coll. NHMO .

Biology: The orange to red larvae develop in leaf galls on a wide range of Salix spp. ( Salicaceae). Each larva develops in a globular, up to 5 mm wide gall which protrudes equally on both sides of the leaf and has a circular exit on the underside. Unlike the previous species, the galls are usually concentrated along the midrib or thick side veins and are usually fused together to form a single irregular gall structure. Univoltine; pupation and hibernation in the soil.

Distribution: Widespread in Europe including Norway, Sweden and Denmark. Morocco.