The larvae of the fly Aulagromyza fulvicornis mine the leaves of willows (Salix sp.). The mine is a corridor which hardly widens from beginning to end. The start is lower-surface, but after some time the mine becomes upper-surface. Part of the frass in thread fragments. http://www.ukflymines.co.uk/Flies/Aulagromyza_fulvicornis.php
Where willows occur.
The mines can be found when willows are in leaf – often in June or July.
It seems to be infrequent in Britain
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
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