The head is black and glossy. The thorax and the abdomen are also black though the tegulae and hind angles of the pronotum are yellowish brown in the female. The legs usually have off-white tibiae though these may be infuscated.
Larvae feed on water avens and garden cultivars.
Size: 5.5 - 6.5mm
Distribution: England, Scotland, Wales
Flight period: May to June
Plant associations: Geum rivale (water avens and its cultivars)
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
Sheppard, D. A., 2019. British Symphyta (draft in preparation)