Arge ustulata

Arge ustulata is a largely brown species with a bronze/green sheen. The stigma is bicolorous being clear yellow at the apex (including the marginal veining) and dark brown at the base. The subcosta and radial vein are pale yellow.

Larvae feed on willows, birches and hawthorn.

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Status: Widespread

Distribution: England, Scotland, Wales, Ireland

Flight period: Bivoltine, May to July

Plant associations: Salix spp. (willows) (4), Betula spp. (birches) (4) and Crataegus spp. (hawthorns) (4) incl...

Salix caprea (Goat Willow) (4)
Salix aurita (Eared Willow) (4)

References:

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

2. Liston, A., 1995. Compendium of European Sawflies, Chalastos Forestry, Daibersdorf

3. 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

4. Lorenz, H. and Kraus M., 1957. Die Larvalsystematik der Blattwespen (Tenthredinoidea und Megalodontoidea). - Abhandlungen zur Larvalsystematik der Insekten No. 1. Berlin: Akadamie - Verlag; 1957.