One of the black species. Females can be separated from the similar Arge expansa by the costa of the forewing being black (pale in expansa) and males have an entirely black hind tibia (expansa have a white base).
Larvae feed on birches or willow.
Distribution: England, Scotland, Wales, Ireland
Flight period: May to June
Plant associations: Betula spp. and Salix spp. (birches and willows)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168