Dolerus cothurnatus

Abdomen red with dark apex. At least the front legs with some red about the knees. Mesopleura with crater-like punctures in the middle. Entire mesonotum black. Female 8-9mm. Male 7-8mm.

Dolerus cothurnatus larvae feed on water and marsh horsetail. 

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Status: Locally common

Distribution: England, Scotland, Wales, Ireland

Flight period: May to July

Plant associations: Equisitum fluviatile and palustre (water horsetail and marsh horsetail)


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.