Rhogogaster viridis (Linnaeus, 1758)

Rhogogaster viridis (nb. naming follows Taeger and Viitasaari)

This species equates to Rhogogaster dryas in Benson's key.
Superficially similar to the other Rhogogaster species and similar to darker examples of Rhogogaster scalaris (=viridis in Benson). Particularly in males, this species has a deep frontal groove and deep antennal furrows. The antennal crests are somewhat bent upwards. Also, Rhogogaster viridis can be differentiated from scalaris by the sculpture on the mesoscutellar appendage. In Rhogogaster viridis the mesoscutellum is distinctly convex and the anterior part is pitted and more or less densely microsculptured. In R. scalaris there are few or no pits and usually without distinct microsculpture.

Larvae feed on aspen.

Size: 8 - 12mm

Status: Local

Distribution: England, Scotland

Flight period: May to August

Plant associations: Populus tremula (aspen)

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

Taeger, A. and Viitasaari, M., 2015. European Rhogogaster s. str., with notes on several Asian species (Hymenoptera: Tenthredinidae). Zootaxa, 4013(3), pp.369-398.