Calameuta filiformis (Eversmann, 1847)

Calameuta filiformis

One of two Calameuta species found in Britain and Ireland. This is the larger species at 9-12mm. It is associated with wet habitats such as fens, marshes and wet woodland. The hind tibia is entirely black, whereas Calameuta pallipes has mainly yellow tibia.
Larvae feed inside the smaller stems of moisture-loving reeds and grasses.


Status: Locally common

Distribution: England (SE of the Humber/Severn line)

Flight period: May to July

Plant associations: Fens and marshes. Calamagrostis epigejos (wood small-reed), Phragmites communis (common reed), various grasses including Agropyron repens (couch grass), Arrhenatherum elatius (false oat-grass), Phalaris arundinacea (reed canary grass)


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.