This species overwinters as an egg and subsequently adults emerge late in the year. The female is mainly reddish-brown excluding parts of the mesonotum and basal tergites. The male is black except for the underside of the abdomen.
Larvae feed gregariously on old needles on pines, especially Scots pine.
Size: 7 - 9mm
Distribution: England, Scotland, Wales, Ireland
Flight period: July to October
Plant associations: Pinus spp. especially silvestris (pines especially 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