This is an arctic-alpine species and confined to the northern uplands. Eyes smaller than all other Empria species: in dorsal view as long as the head behind the eye. Mostly a black insect with brownish-white on the labrum, margin of the pronotum and the edge of the tegulae. The margin of the clypeus is also often off-white. Pairs of pale patches are present on tergites 2 to 7 in the female and tergites 2 to 5 or 6 in the male. The ratio of the length of the flagellum, along with genitalia characteristics, are important for identification in this group. See Prous et al, 2011.
Empria alpina larvae feed on mountain avens.
Size: 5.5 - 6mm
Distribution: Scotland, Ireland
Flight period: June
Plant associations: Dryas octopetala (mountain avens)
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.