Food Plant: Crepis versicaria (Beaked hawks-beard), Hieracium sabaudum (New England hawkweed), Lapsana communis (Nipplewort), Picris sp., P.echioides (Bristly Oxtongue), P. hieracioides (Hawkweed Oxtongue), Pilosella officinarum (Mouse-ear-hawkweed), Senecio aquaticus (Marsh Ragwort), Sonchus arvensis (Perennial Sow-thistle), S. asper (Prickly Sow-thistle), S.oleraceus (Smooth Sow-thistle), Taraxacum officinale (Dandelion)

Mine: Summer; Autumn

Notes: Forms a very long linear mine, which is frequently underside and may also be upperside. The mine starts lower surface. Pupation is outside the mine. A common leaf miner. Mine shown on Taraxacum officinale.

Data: 4.viii.2017, Bodnant Gardens, Conwy, Caernarvonshire, VC49, Wales

Image:© Barry Warrington

References:
Hering, M (1957) - Bestimmungstabellen der Blattminen von Europa.
Robbins, J (1990) - A Provisional Atlas of The Leaf Miners of Warwickshire.
Spencer, K A (1976) - The Agromyzidae of Fennoscandia and Denmark.
Spencer, K.A (1972) - "Diptera: Agromyzidae" Handbooks for the Identification of British Insects, Royal Entomological Society of London.