The female sawsheath is distinctive being truncate apically when viewed from above with strong setae on the sides and curved setae at the apex. Males are pale on the face, pronotum and the tegulae are creamy-white. The underside of the thorax is black with a longitudinal band in the middle. Males can be determined by the shape of the penis valves.
Larvae feed on goat willow.
Size: Female: 7 - 8mm, male: 6 - 7mm.
Distribution: England, Scotland, Wales, Ireland
Flight period: May to June
Plant associations: Salix caprea (goat 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