Size: 7 to 9 mm. Allantus rufocinctus is the only Allantus species in the British Isles to have both a red girdled abdomen and black hind femora. The abdomen is black, girdled with red across tergites three or four to five or six. Hind femora are black with at most the extreme base white. The mesopleura has punctures on the upper part. Tegulae white and hind trochanters at least marked with white.

Allantus calceatus is similar but the hind femora are red.

Please provide a clear photograph showing the key details.

Hedgerows and other areas where the larval foodplants are found.

Flight period: May to July.

Larvae feed on roses and brambles.

Widespread in England and Wales.

Rare or rarely recorded in Leicestershire and Rutland.

https://www.sawflies.org.uk/allantus-rufocinctus/