There is very little published information on this entirely black species. The front lobe of the mesonotum has a fine medial groove. The mesosternum is almost impunctate.
Larvae are unknown but the species is found close to water bodies.
Distribution: England, Scotland
Flight period: March
Plant associations: unknown
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