Both males and females occur in Britain and Ireland. The basal tergites of the abdomen have regular transverse coriaceous sculpture. The male's head, thorax and abdomen are mostly black dorsally. The female usually has a black fleck on the middle lobe and lateral lobes of the mesonotum and with an all black mesosternum. The sawsheath is acuminate in dorsal view.
Larvae feed on birches.
Size: 6 - 7.5mm
Distribution: England, Scotland, Ireland
Flight period: May to June
Plant associations: Betula spp. (birches)
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.