The larvae of the fly Chromatomyia horticola mine the leaves of various plants including Purple Toadflax creating an upper-surface, less often lower-surface corridor. Frass in isolated grains. Pupation within the mine, in a, usually lower-surface, puparial chamber.
Please include photographs with your record. For leafmines the images should include a backlit image to show any frass patterns. Please also state the host plant for leafmines.
Various habitats and mining a wide range of plants.
Mines can be seen whenever the host plants are in leaf.
Widespread in Britain. Difficulties of identification make true status hard to determine.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015