Trachelus troglodyta
Larger of the two species found in Britain at 10-14mm. Previously recorded from London and Hertford. Abdomen with yellow bands and wings yellowish with yellow veins and stigma.
Status: Extinct in Britain
Distribution: Formerly England
Flight period: June
Plant associations: Rye
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