Apethymus filiformis

Recorded throughout much of Britain north to southern Scotland (Musgrove, 2023).

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

GB IUCN Status: Least Concern
GB Rarity Status: None

Distribution: England, Scotland, Wales, Ireland

Flight period: September to November

Plant associations: Quercus spp. (oaks)

The National Biodiversity Network records are shown on the map below. (See terms and conditions)

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

Musgrove, A.J. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished