A smaller, slender all black Dolerus species. Formerly considered as a variety of Dolerus sanguinicollis. However, Lacourt identified it as a seperate species. The mesoscutellar appendage has striations across its surface in fumosus. In females the sawsheath is not dilated in dorsal view and with outward directed curved setae. The penis valve in males is distinctive.
Larvae feed on grasses.
Size: 6 - 8mm
Distribution: England, Scotland, Wales
Flight period: April to June
Plant associations: Gramineae (grasses)
Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
Lacourt, J. 1998: Note sur Dolerus (Poodolerus) sanguinicollis (Klug, 1818) Hartig, 1837. (Hymenoptera, Tenthredinidae). - L'Entomologiste. Revue d'Amateurs, Paris 54(3): 129-133
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