Empria tridens (Konow, 1896)

Empria tridens

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 avens, raspberry, etc.

Size: Approx. 5.5 - 7mm

Status: Common

Distribution: England, Scotland, Wales, Ireland

Flight period: May to June

Plant associations: Geum spp., Rubus idaeus, etc. (avens, raspberry, etc.)

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

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.