Dolerus eversmanni
A mostly black species with red, if present, restricted to front tibia and apex of femur. Males have a white membranous patch covering the middle of tergites 5 and 6. In the female the sawsheath narrows to a point in dorsal view and has a feeble hook below in lateral view.
Dolerus eversmanni larvae feed on horsetails in wet areas.
Size: 9 - 10mm
Status: Widespread
Distribution: England, Scotland, Wales, Ireland
Flight period: April to June
Plant associations: Equisetum sp. (horsetails - wet habitat species)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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- Dolerus eversmanni female Credit Andrew Green
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- Dolerus eversmanni female Credit Andrew Green
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- Dolerus eversmanni larva (netherlands species) Credit Leo Blommers
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