Pristiphora borea - Pristiphora carinata group
The hind femur is mainly brown. The clypeus is more or less emarginate medially. The female is best determined by the characteristics of the saw. Males are best determined by the penis valve.
Pristiphora borea larvae feed on dwarf birch.
Size: 5.5 - 7.5mm
Flight period: May to July
Plant associations: Betula nana (dwarf birch)
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., Kramp, K., Vikberg, V. and Liston, A., 2017. north-Western Palaearctic species of Pristiphora (hymenoptera, tenthredinidae). Journal of Hymenoptera Research, Vol. 59