Pamphilius histrioPamphilius histrio is a species of leaf-rolling sawflies within the Symphyta belonging to the family Pamphiliidae.DistributionThis species is present in most of Europe.DescriptionPamphilius histrio can reach a length of about. Head and thorax are black with yellowish markings. Legs are yellow and wings are transparent.BiologyLarvae feed on Populus tremula.