Monophadnoides ruficruris
The thorax is black and the abdomen almost so, but the pronotal margin and tegulae are yellow. The hind tibia are yellow. The head with the supra-antennal grooves faint or absent. Tarsal claws are bifid with the inner and outer tooth well apart.
Larvae have branched spines and feed on brambles, etc.
Size: 6 - 8mm
Status: Common
Distribution: England, Scotland, Wales
Flight period: May to June
Plant associations: Rubus spp.(brambles, etc.)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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References:
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