Allantus is charcterised in the Allantini by having a hind wing with neither an enclosed middle cell or peripheral vein. In the forewing, the anal cell is complete and with an oblique cross-vein. On the underside of thorax, the propleurea meet with a broad connection. The antennae, which are nine-segmented, have the eight antennal segment is almost three times as long as the breadth at the apex of that segment. The post-genal carina extends beyond the top of the eyes almost as far as the post-occipital area.
Allantus is primarily a Eurasian genus with a few species located in the Americas. There are 10 species listed in Britain, four of which are also recorded in Ireland. The adults are slender bodied and often with a white or yellow band on one of the tergites. The larvae are free living and on maturity tunnel into twigs and stems to overwinter.
Allantus basalis (Klug, 1818)
Allantus calceatus (Klug, 1818)
Allantus cinctus (Linnaeus, 1758)
Allantus cingulatus (Scopoli, 1763)
Allantus coryli (Stritt, 1937)
Allantus laticinctus (Serville, 1823)
Allantus melanarius (Klug, 1818)
Allantus rufocinctus (Retzius, 1783)
Allantus togatus (Panzer, 1801)
Allantus truncatus (Klug, 1818)
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