Arge metallica is not found in Britain but is present in Ireland. One of the dark species, Arge metallica has a bronze sheen. The flagellae are yellow but may be suffused with black in the males. The hind tibia is brown with a white base.
Larvae feed gregariously on birch. Eggs are lain into the serrations of the leaf margin on young trees in shade.
Size: 7 - 9mm
Flight period: June
Plant associations: Betula spp. (birch)
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
Schedl, W.; Altenhofer, E. 2013: Zur Morphologie, Biologie und Verbreitung von Spinarge metallica (Klug 1834) in Österreich (Hymenoptera: Argidae). - Linzer biologische Beiträge, Linz 45(1): 663-669.