The larva of the fly Aulagromyza heringii mines the leaves of Ash producing an upper surface, short linear-blotch mine, beginning with a small yellowish-brown pustule.
Where Ash is present.
The larval mines may be seen when the host species, Ash, is in leaf.
Local in Britain.
Rare or under recorded in Leicestershire and Rutland.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015