The abdomen is almost entirely yellowish-white with at most the basal tergite sutures blackened. The sunken parts of the mesonotum are mainly pale. Wings in both sexes are creamy white. In the similar Hoplocampa ariae the wings are yellowish. Males can be determined by the penis valves.
Larvae feed in the developing fruits of mountain ash.
Size: 3.5 to 5.5mm
Distribution: England, Scotland, Ireland
Flight period: May to June
Plant associations: Sorbus aucuparia (mountain ash)
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