Fenusella hortulana (Klug, 1818)

Fenusella hortulana

Antennae with 10 segments, or with a very long ninth more than 1.5 times as long as the eighth. Pronotum yellow and mesopleura marked with yellow. Labrum, clypeus and base of mandibles more or less white. The abdomen is piceous with pale apical margins on tergites and sternites. In the female the hind femur is yellow ventrally.

Fenusella hortulana larvae feed in mines in the leaves of black poplar.

Size: Approx. 4 - 6mm

Status: Rare

Distribution: England, Ireland

Flight period: May to June

Plant associations: Populus nigra (black poplar)

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