Tenthredo thompsoni (Curtis, 1839)

Tenthredo thompsoni

A smaller yellow and black species. The antennal flagellae are entirely black but with yellow scapes. The underside of the abdomen is mostly black. The yellow bands on the tergites do not broaden at the sides. Tegulae black. The hind tarsus black and apex of tibia is black in the male and reddish in the female. Associated with marsh edges and chalk downs.
Larvae feed on marjoram, mints, plantains and gypsywort.

Size: 9 - 11mm

Status: Locally common

Distribution: England, Wales

Flight period: July to September

Plant associations: Origanum vulgare (marjoram), Mentha (mint), Plantago (plantain) and Lycopus (gypsywort)

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]