Euura olfaciens (Benson, 1953)

Euura olfaciens

This species is similar to Euura ribesii and Euura leucotrochus from which it differs by having a clypeus deeply incised to at least half the depth of the clypeus. In both genders the abdomen is mainly yellow except for at most the basal two tergites. The female has the head and mesonotum black except for some yellow on the inner orbits.

The male has the mesopleura mainly black. The abdomen above is as per the female but may have a medial row of black flecks.

Euura olfaciens larvae feed on currants, including blackcurrant.

Size: Female: 5.5 - 6.5mm, male: 5.5 - 6.5mm.

Status: Widespread

Distribution: England, Scotland

Flight period: Univoltine, April to May

Plant associations: Ribes spp., including Ribes nigrum (currants, including blackcurrant)

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.63-127