A genus of slender, elongate sawflies. This species has an entirely black abdomen and red hind femurs. The tegulae and usually the hind margin of the pronotum are white. The legs are yellow for the most part but the trochanters and coxae are white and the dark of the hind tarsi continues onto the apex of the hind femur.
Size: 5 - 6mm
Distribution: England, Wales, Ireland
Flight period: bi- or multivoltine, May to June, August
Plant associations: Possibly Populus tremula (aspen)
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