Empria immersa (Klug, 1818)

Empria immersa

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

Status: local

Distribution: England, Scotland, Wales, Ireland

Flight period: May to June

Plant associations: Possibly Salix spp. (poss. willows)

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.