Eutomostethus nigrans (Konow, 1887)

Eutomostethus nigrans

Previously considered to be the black form of Eutomostethus ephippius but raised to species level by Blank and Taeger in 1998. Head, thorax and abdomen are all black. Morhologically identical to E. ephippius. A more northern distribution. Males not known.

Larvae feed on soft grasses such as annual meadow grass.

Size: 4 - 5mm

Status: Common

Distribution: England, Scotland, Wales, Ireland

Flight period: Possibly bivoltine, May to June and August

Plant associations: Gramineae (grasses, especially Poa spp.)

References:

Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London

Blank, S.M. and Taeger, A., 1998. Comments on the taxonomy of Symphyta (Hymenoptera). Pflanzenwespen Deutschlands (Hymenoptera, Symphyta).–Krefeld, pp.141-174.

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

Macek, J. (2014) ‘Descriptions of larvae of the Central European Eutomostethus species (Hymenoptera: Symphyta: Tenthredinidae)’, Acta Entomologica Musei Nationalis Pragae, 54(2), pp. 685–692.