Strongylogaster xanthocera (Stephens, 1835)

Strongylogaster xanthocera

Males apparently more frequent than females. Females have at least the first three segments yellow. The anal cells of the fore wing lack a cross-vein. The labrum is black. The sawsheath of the female is divergent at the apex. In the male the abdomen has the first tergite black right to the lateral margins and usually with at least the second tergite black also. The remainder are orange-red.

Larvae feed on bracken.

 

Size: 8 - 11mm

Status: Local

Distribution: England, Scotland, Wales

Flight period: May to June

Plant associations: Pteridium aquilinum (bracken)

References:

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

Macek, J., 2010. Taxonomy, distribution and biology of selected European Dinax, Strongylogaster and Taxonus species (Hymenoptera: Symphyta). Acta Entomologica Musei Natioalis Pragae, 50(1).