The abdomen is entirely black. The antennae are black with segments six to eight white in the female and also sometimes in the male. The hind tibiae are white basally contrasting with the black apices.
This species overwinters as an egg. Larvae feed on oaks.
Size: 8 - 10mm
Distribution: England, Scotland, Wales, Ireland
Flight period: September to November
Plant associations: Quercus spp. (oaks)
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