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.
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)
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 Natural England, unpublished