Food Plant: Elymus repens (Couch Grass), Zea mays (Sweetcorn), Dactyis glomerata (Cock's-foot Grass)

Mine: October (adult bred - emerged 14.iii.2018). Seems to be univoltine.

Notes: The mine is at the tip of the leaf and the frass is large and granular. Pupariation is within the leaf and a puparium can be seen (top right). Several larva mine together. The adults are similar to those of Cerodontha incisa and the differences are in the thickness of the jowls.

Agromyzidae Recording Scheme Grade: 5

Data: 21.x.2017, Downham Market, Norfolk, VC28

Image:© Rob Edmunds

References:
Spencer, KA (1971) - Cerodontha (Poemyza) hammi sp. n in 'Notes on a revision of the British Agromyzidae (Diptera) including the description of 14 new species', Entomologist's Gazette, 22, p157-158
Spencer, K A (1972) - "Diptera: Agromyzidae" Handbooks for the Identification of British Insects, Royal Entomological Society of London
Spencer, K A (1976) - The Agromyzidae of Fennoscandia and Denmark
Warrington, BP (2023) - A new host genus for the leaf-mining flies Cerodontha (Poemyza) hammi Spencer and Cerodontha (Poemyza) pygmella (Hendel) (Diptera:Agromyzidae), Br.J.Ent. Nat.Hist 36(4), 251-252