A species with a northerly distribution in Britain. The British subspecies Allantus basalis caledonicus may in fact be a separate species from Allantus basalis basalis. Both forms have been found in Scotland. The abdomen is black with a pale off-white to yellow girdle on the tergites. The hind femora are black. The labrum, palps and front trochanters are also yelowish-white. Coxae are for the most part black. In subsp. caledonicus, the apices of the hind tibia and tarsus are reddish-brown and in subsp. basalis they are black.
Larvae feed on roses.
Size: 7 - 10mm
Distribution: England, Scotland
Flight period: June to July
Plant associations: Rosa spp. (roses)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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