The fore wing has a dark patch covering the submarginal cells beneath the stigma extending into the middle of the wing. Also in the fore wing, vein cu-a is interstitial with vein m. The body is black with yellowish-white on the tegulae, first tergite and tergites five (or four and five) and the two apical tergites. Legs are black with white on the trochanters, fore and middle femora apices and tibiae. The apices of the fore and mid tibiae and all tarsi are reddish brown.
Larvae feed on various trees especially oaks and sometimes birches and willows.
Size: 8 - 9mm
Distribution: England, Scotland, Wales
Flight period: June to August
Plant associations: Quercus spp., Betula spp. and Salix spp. (oaks, birches and willows)
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