The female's inner apical spur of the hind tibia is shaped like a scale. Apex of the sawsheath in dorsal view is much broader than the apical breadth of the hind tibia. The underside of the thorax is pale and the underside of the abdomen at most brownish along the margins of the sternites. The head lacks a dark band reaching from eye to eye.
The male pronotum is at most narrowly margined with yellow and the clypeus and labrum are yellow or brownish.
Larvae feed gregariously on pines, especially Scots pine.
Size: 6 - 8mm
Distribution: England, Scotland
Flight period: May to July
Plant associations: Pinus spp., especially sylvestris (Scots pine)
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