Dolerus varispinus
An entirely black species. In females the sawsheath is broad at the tip with curved setae. The mesonotum is shiny with scattered shallow punctures. In the male, the post-scutellum has a weak median carina and usually with rough transverse striations.
Size: 8-9mm
Status: Widespread, but less common in Ireland
Distribution: England, Scotland, Wales, Ireland
Flight period: April to June
Plant associations: Gramineae (grasses)
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- Dolerus varispinus male
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- Dolerus varispinus male penis valve
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- Dolerus varispinus male
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