A mostly black species with red, if present, restricted to front tibia and apex of femur. Males have a white membranous patch covering the middle of tergites 5 and 6. In the female the sawsheath narrows to a point in dorsal view and has a feeble hook below in lateral view.
Distribution: England, Scotland, Wales, Ireland
Flight period: April to June
Plant associations: Equisetum sp. (horsetails - wet habitat species)
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