The pale colour is green in life fading to yellow in death. The female of this species is similar to viridissimus but markings on the metascutellum differ. In viridis the metascutellum is sometimes entirely pale, often darkened on the hind margin, or with a crescent-shaped dark mark that is sometimes divided into two spots. In viridissimus, the metascutellum is pale with a conspicuous black spot centrally that is round or elliptical. Males of this species have a black mesosternum.
Larvae feed on birches.
Size: Female: 6.0 - 9.0mm, male: 5.0 - 6.0mm.
Distribution: England, Scotland, Wales, Ireland
Flight period: April to May, July to August
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
Muche, W.H., 1974. Die Nematinengattungen Pristiphora Latreille, Pachynematus Konow und Nematus Panzer (Hym., Temthredinidae). Deutsche Entomologische Zeitschrift, 21(1/3), pp.1-137.
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