Similar in appearance to the much more frequently encountered Aneugmenus padi. This species is smaller at only around 5mm and the legs are a deeper yellow to orange colour (bright yellow in padi). The remainder of the insect is black. The head is shiny and lacks sculpture or puncturation.
Although the eggs are often laid on scarlet pimpernel, speedwells, forget-me-nots, etc. Vikberg reports that the larvae feed on mosses in Finland.
Size: approx. 4 - 5mm
Distribution: England, Scotland, Wales, Ireland
Flight period: May to September
Plant associations: Mosses
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
Vikberg, V & Nuorteva, M. (1997) On the rearing of Nesoselandria morio(Fabricius) and Birka cinereipes(Klug) (Hymenoptera, Tenthredinidae), with descriptions of their larvae. Entomologica Fennica. 8. 27-38.