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.

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.