1a larva mines from a helicoidal case, makes fleck mines: Apterona helicoidella

1b larva mines from within the leaf => 2

1c gallen etc. => Tabellen voor alle parasieten per soort

2a larva with obvious head and feet; the older larva lives free in a spun leaf: Aproaerema anthyllidella

2b larva a maggot; mines till just before pupation => 3

3a gallery pinnately branched, main and side branches on top of midrib and side veins: Liriomyza strigata

3b gallery little, irregularly branched, its course independent of the leaf venation => 4

4a frass in a broad central band, with minute granules at either side: Liriomyza congesta

4b frass in short strings, alternating in two rows alongs the sides of the gallery: Liriomyza cicerina