The smallest of the Strongylogaster species. The thorax is black with a predominantly orange-yellow abdomen (dark at the base and apical tergites in the female). The orange tergites 2 to 5 on the female are often contiguous with yellow marks on the lateral faces. Clypeus and labrum are white. Femora are usually red and at least the front four are red in the male.
Strongylogaster macula larvae feed on ferns.
Size: Approx 5 - 7mm
Distribution: England, Scotland, Wales, Ireland
Flight period: May to June
Plant associations: Athyrium filix-femina (lady fern), Pteridium aquilinum (bracken), etc.
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