Euura oligospila

Previously spelt oligospilus and placed in the genus Nematus this species is sometimes known as Willow Sawfly, but this name is sometimes applied to different species. Many sawflies (especially in this subfamily) live on willows so it isn't an especially helpful vernacular name. This individual came to light.

female Euura oligospila showing saw, Whitwell Street, near Reepham (Norfolk, UK), 3rd September 2020