Dolerus gessneri
Recorded locally but widely mostly in northern and western Britain, with records from Bristol, Coventry and Lincolnshire representing the south-eastern edge of the range at time of writing (Musgrove, 2023).
A smaller species. Normally all black except for red front and middle knees although more rarely the female abdomen is more or less girdled in red. This species is best determined from examination of the genitalia.
Larvae feed on wet habitat horsetails.
Size: 9 - 10mm
Status: Least Concern
Status: None
Distribution: England, Scotland, Wales, Ireland
Flight period: May 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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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 Natural England, unpublished