Cladius brullei (Dahlbom, 1835)

Cladius brullei

According to Prous et al, 2019, there is currently no reliable key or species treatment available for this genus and this species is inseparable from Cladius compressicornis. The description follows Benson.
The head is dulled by fine durface sculpture or hair-warts. The wings are infuscate and the abdomen black usually with a brown spot in the middle of the first tergite. The median facial fovea between the antennae is separated from the frontal basin above by an unbroken ridge.

Larvae feed on brambles especially raspberry and also mountain ash.

 

Size: 4.5 - 7mm

Status: Common

Distribution: England, Scotland, Wales, Ireland

Flight period: Bivoltine, May to August

Plant associations: Rubus spp., esp. Rubus idaeus and also on Sorbus aucuparia (brambles, esp. raspberry and also on mountain ash)

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

Prous, M., Liston, A., Kramp, K., Savina, H., Vårdal, H. and Taeger, A., 2019. The West Palaearctic genera of Nematinae (Hymenoptera, Tenthredinidae). ZooKeys, 875, p.63.