The thorax is entirely black and the abdomen almost so. Hind tibia black but on the outer side of the base it may be dark rather than black. The head has deep supra-antennal grooves. The antennal pedicel is as broad as, or broader than, it is long. Tarsal claws have a basal lobe and are bifid with the inner and outer tooth close together.
Monophadnoides rubi larvae have branched spines and feed on meadowsweet, avens and bramble species.
Size: 5 - 6mm
Distribution: England, Scotland, Wales
Flight period: May to June
Plant associations: Filipendula spp., Geum spp. and Rubus spp.(meadowsweet, avens and brambles, etc.)
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