Cimbex connatus (Schrank, 1776)

Cimbex connatus

A large yellow and brown species very similar to Cimbex luteus. However, connatus is a darker insect with dark marking on the first three tergites. In luteus the 3rd tergite has at most a narrow central dark mark and with much more extensive yellow on the underside of the abdomen. In connatus, the thorax is generally a darker orange colour and the back of the head and scutellum are shinier with less puncturation and fewer hairs.

Size: 20 - 28mm

Status: Local

Distribution: England, Wales, Ireland

Flight period: May to June

Plant associations: Alnus spp. (alders)

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