Rarely found in Britain and Ireland. Occurs sporadically in Scandinavia. Very similar to the commoner Trichiosoma lucorum and vitellina. Trichiosoma laterale may be overlooked by confusion with the other two. Trichiosoma laterale is mainly black but more or less reddish-brown laterally. On the apical tergites, the silky, adpressed pubescence does not obscure the underlying puncturation.
Larvae feed on birch and willow.
Size: 13 - 24mm
Distribution: England, Scotland, Ireland
Flight period: May to July
Plant associations: Betula spp. and Salix spp. (birches and willows)
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
Viitasaari, M. 1989: Taxonomic notes on the genus Trichiosoma Leach (Hymenoptera, Cimbicidae) II. - Annales Entomologici Fennici, Helsinki 55 (3): 111-129