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 dark and the head has a dark band reaching from eye to eye. The stigma and costa are yellow. Antennae 18 segmented.
The male pronotum is broadly margined with yellow. The apical 3 tergites are almost entirely red as well as the whole of the underside.
Larvae feed gregariously on pines, especially Scots pine.
Size: 7 - 9mm
Flight period: May to July
Plant associations: Pinus spp., especially sylvestris (Scots pine)
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