A largely black bodied species. Antennae are partially banded in white and the stigma are bicolorous. The abdomen colour is variable in both sexes but at least the basal tergites black. up to the five apical tergites may be red in the female. Males usually have basal tergites black, the middle segments may be marked yellowish-white dorsally and the apical tergites reddish-brown.
Size: 12 - 15mm
Distribution: England, Scotland, Wales, Ireland
Flight period: May to August
Plant associations: Pteridium aquilinum (bracken), Epilobium (willowherbs), Lonicera (honeysuckles), Corylus (hazel), Rosa (roses), Salix (willows), Sorbus (mountain ash) and Viburnum (wayfarer, guelder rose)
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
Fekete, K. (2018) Beginner’s guide to identifying British Tenthredo, Natural History Museum, London. http://www.nhm.ac.uk/content/dam/nhmwww/take-part/identification-trainers/sawflies-guide-id-trainees.pdf [Accessed 26Apr2019]