Dolerus (Poodolerus) nigratus (Müller, 1776)

Dolerus nigratus

A large, black species. In females the long setae on each side of the sawsheath tip are almost straight. The cenchri are white and closer together than 1.5 times their own width. In males, tergite 8 has a triangular membranous area that reaches forward to at least the middle of the tergite. The mesonotum in both sexes is densely punctured throughout.

Size: 9-10.5mm

Status: Common

Distribution: England, Scotland, Wales, Ireland

Flight period: April to June

Plant associations: Graminaceae (grasses)

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