Pristiphora groenblomi - Pristiphora carinata group
The stigma is brown and not darker than the costa. The labrum, pronotum, tegulae, coxae, femora and bases of tibia are reddish-yellow. The female is best determined by the characteristics of the saw. Males are best determined by the penis valve.
Pristiphora groenblomi larval food plant is unknown but might be a birch species. It is associated with uplands.
Size: Assumed 5.5 - 7.5mm
Flight period: May to July
Plant associations: Unknown, but possibly Betula sp. (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