Hymenoptera: Tenthredinidae - sawfly Euura venusta Photographs on Salix caprea, Goat Willow / Great Sallow Hosts: Salix aurita, caprea, lapponum. Rare on S. cinerea Forms a +/- thin-walled gall causing swelling of leaf petioles. Galls contain a single larva, pupation occurs in the soil. Univoltine

Euura venusta
Kingston Lacy, Dorset. December 2017