A black sawfly with pairs of white patches on tergites 2 to 5 (or 6). Claws with a large subbasal tooth (check all legs). The stigma is black, though this may fade in older specimens. In the female the apical tergites are black.
Empria immersa larvae feed on willows.
Size: 6 - 7mm
Distribution: England, Scotland, Wales, Ireland
Flight period: May to June
Plant associations: Possibly Salix spp. (poss. willows)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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.