Anaphalis, Pearly Everlasting
1a pinnately branched corridor, overlying the midrib and main lateral veins: Liriomyza strigata
1b corridor little or not branched, not associated with the leaf venation => 2
2a pupation within the mine in a, usually lower-surfsce, pupal chamber: Chromatomyia cf. syngenesiae
2b pupation outside the mine: Phytomyza conyzae
Not included in the key (probably not even a miner): Tebenna micalis.