Included in the Empria longicornis group along with the species alector, alpina, longicornis, and minuta, all of which are similar. The posterior margins of the pronotum are pale, as are the tegulae and the basal third of the hind tibia to some degree. Paired pale patches on tergites 2 to 6. The ratio of the antennal flagellae to the breadth of the head, along with genitalia characteristics are needed to confirm the identification of this group. See Prous, et al 2011.
Empria tridens larvae feed on raspberry and possibly dewberry.
Size: Approx. 5.5 - 7mm
Distribution: England, Scotland, Wales, Ireland
Flight period: May to June
Plant associations: Rubus idaeus and possibly Rubus fruticosus. (raspberry and dewberry.)
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
Prous, Marko & Heidemaa, Mikk & Soon, Villu. (2011). Empria longicornis species group: Taxonomic revision with notes on phylogeny and ecology (Hymenoptera, Tenthredinidae). Zootaxa. 2756. 1-39. 10.11646/zootaxa.2756.1.1.