Dolerus (Poodolerus) haematodes
A conspicuous metallic species. In females, the black head and abdomen have a blue-green sheen and the pronotum is marked with red. Males are entirely black but the thorax and head can appear tarnished with metallic greens, blues and bronzes. In both sexes, the lateral lobes of the mesonotum are well punctured. Males best determined by penis valve shape.
Distribution: England, Scotland, Wales, Ireland
Flight period: March to June
Plant associations: Cyperaceae and Graminaceae (sedges and grasses).
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