Dolerus triplicatus - Triplex Mourner

Recorded widely throughout the south-east quarter of Britain, with just single records to date in Scotland and Wales (Musgrove, 2023).

Except for the first tergite, subsequent tergites are shiny without sculpture. Legs are entirely black. From above the thorax is predominately orange except for the front of the middle lobe and the side lobes. The whole abdomen is also orange.

Larvae feed on rushes.

Jump to other Dolerus species

Size: 9.5-10.5mm

GB IUCN Status: Least Concern
GB Rarity Status: None

Distribution: England, Scotland, Wales

Flight period: May to June

Plant associations: Juncus sp. (rushes)

The National Biodiversity Network records are shown on the map below. (See terms and conditions)

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

Musgrove, A.J. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished