Arge berberidisArge berberidis, common name berberis sawfly, is a species of sawflies belonging to the family Argidae subfamily Arginae.DescriptionArge berberidis can reach a length of about. Adults have bluish-black head and body. Wings are brown. This species has saws-sheath shaped tong. Larvae show black head and a greyish body with many small black spots and some yellowish blotches.BiologyLarvae are considered a severe pest causing defoliation in the host plants. Adults fly from June to August.DistributionThis sawfly is present in most of Europe.HabitatThese sawflies can be found on Mahonia and Berberis species.