The Empria longicornis group includes the species alector, alpina, longicornis, minuta and tridens, all of which are similar. The posterior margins of the pronotum are pale. Paired pale patches on tergites 2 to 4 (or 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 longicornis larvae feed on raspberry, meadowsweet and strawberry.
Size: 5.5 - 7.5mm
Distribution: England, Scotland, Wales, Ireland
Flight period: May to June
Plant associations: Rubus idaeus, Filipendula ulmaria and Fragaria spp. (raspberry, meadowsweet and strawberry)
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.