Tenthredo neobesa Zombori, 1980

Tenthredo neobesa

A very dark species almost entirely black all over except for the more or less yellowish hind margin of the pronotum, tibiae and apical margins of tergites three to five. Wings infuscate especially at the apices.
Larvae feed on sowthistles.

Size: 11 - 13mm

Status: Possibly extinct in Britain (last recorded in Wicken Fen)

Distribution: England

Flight period: June to July

Plant associations: Sonchus arvensis (sowthistle)

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

Fekete, K. (2018) Beginner’s guide to identifying British Tenthredo, Natural History Museum, London. http://www.nhm.ac.uk/content/dam/nhmwww/take-part/identification-trainers/sawflies-guide-id-trainees.pdf [Accessed 26Apr2019]