Cephus nigrinus Thomson, 1871

Cephus nigrinus

Easily recognised as the only Cephus species with an all black abdomen, although occasionally British specimens have yellow flecks on the lateral margins of some tergites. The sawsheath is set in a straight line with the oblong plate. Appears to be a woodland species in the Britain. 7-10mm.

 

Status: unknown

Distribution: England

Flight period: May to July

Plant associations: Poa pratensis (smooth meadow-grass)

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