In both genders the abdomen is entirely black. In the female is mostly black with brown on the upper and inner orbits and the labrum. The legs are largely yellowish-brown. The cerci are shorter than the sawsheath when viewed from above.
The male is coloured much as the female.
Larvae feed on willows, poplars and members of the buttercup family including columbine, delphiniums and peonies.
Size: Female: 8.0 - 9.0mm, male: 7.5 - 8.5mm.
Distribution: England, Scotland, Ireland
Flight period: May, June to August (and sometimes September)
Plant associations: Salix spp., Populus spp. and Ranunculaceae (willows, poplars and members of the buttercup family including columbine, delphiniums and peonies).
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
Prous, M., Liston, A., Kramp, K., Savina, H., Vårdal, H. and Taeger, A., 2019. The West Palaearctic genera of Nematinae (Hymenoptera, Tenthredinidae). ZooKeys, 875, p.63-127