The thorax is black and the abdomen yellow. The wings are infuscate except for the extreme base and the stigma is yellowish-brown posteriorly. The front mesonotal lobe is finely punctured with dense pubescence. The clypeus is entirely black. The pronotum is mostly black and the first antennal segment also black.
Larvae feed on slender sedge in wet habitats including moorland mires and bogs.
Size: 6 - 7mm
Distribution: England, Scotland, Wales
Flight period: May to June
Plant associations: Carex lasiocarpa (slender sedge)
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