Tenthredopsis ornata (Serville, 1823)

Tenthredopsis ornata

As with all Tenthredopsis species Tenthredopsis ornata is variable in colour. The description given here follows Blank and Ritzau 1998 but it should be noted that British specimens may differ in colour from continental counterparts.

Both genders are similar. The hind tarsi are mostly black though the apical segments are often brownish. The abdomen is black with dark red marks on the middle segments. The mesepisternum is entirely black. The clypeus is deeply incised apically. The underside of the abdomen is marked with black longitudinal stripes.

Larvae unknown but likely to feed on grasses.


Size: 8 - 10mm

Status: Widespread

Distribution: England, Scotland

Flight period: May to June

Plant associations: Probably Gramineae (grasses)


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 Ritzau, C., 1998. Die Tenthredopsini Deutschlands (Hymenoptera: Tenthredinidae). Pflanzenwespen Deutschlands (Hymenoptera, Symphyta). Kommentierte Bestandsaufnahme, pp.227-246.

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