Apethymus filiformis

The abdomen in Apethymus filiformis is generally yellow except for the first tergite but may be infuscated to appear nearly black. The antennae are entirely black in both sexes and the hind tibiae are yellow with only the extreme apex infuscate.

This species overwinters as an egg. Larvae feed on oaks.

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Size: 9 - 11mm

Status: Locally common

Distribution: England, Scotland, Wales, Ireland

Flight period: September to November

Plant associations: Quercus spp. (oaks)


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