A black species. In the female, the top of the head, mesonotum and mesopleura have dense woolly pubescence that is longer than the width of the apex of the fore basitarsus. In both sexes, the front margin of the clypeus is sharply incurved and emarginated to a depth of much less than half the length of the clypeus.
Distribution: England, Scotland, Wales
Flight period: May to June
Plant associations: Cyperaceae (sedges)
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