In life the pale parts are green. Otherwise the species is black with light yellow on the labrum, mandible base, back corners of the Pronotum and tegulae. On the abdomen the lateral faces of the tergite, most of the ninth tergite and the underside are pale. Often a small temporal spot on the head and the upper corner of the eye and the rear orbits are brownish. The base of the coxae are black, the apices of the trochanter are whitish, the tibiae are yellowish, and the apices of the hind tibiae and tarsi are brown.
Euura vaga larval food plants are uncertain but reportedly reared from sedges and willows.
Size: 6.0 - 7.0mm.
Distribution: England, Scotland, Wales, Ireland
Flight period: May to August
Plant associations: Uncertain but reportedly reared from Carex spp. and Salix spp. (sedges and willows)
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