The female has the front mesonotal lobe and the underside of the thorax frequently marked with black. The sawsheath is very thin and almost parallel-sided when viewed from above, but the apex is truncated. The cerci are relatively long so that the sawsheath exceeds the cerci by no more than half the length of the cerci.
Males are best determined by the shape of the penis valves. The scutellum is densely punctured all over and without a median furrow.
Larvae feed on creeping willow.
Size: Female: 7 - 9mm, males: 5.5 - 6.5mm.
Distribution: England, Scotland, Wales, Ireland
Flight period: April to June
Plant associations: Salix repens (creeping willow)
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