1a fleck mine; the larve mines the leaf from the outside => 2

1b the larva lines from the inside => 4

1c galls, etc => Tables for all parasites per species

2a larva lives between spun leaves: Syncopacma linella

2b larva lives in a transportable case => 3

3a opening of the mine irregular, in comparison to the size the mine rather large: Apterona helicoidella

3b opening neatly round, relatively small: Coleophora striolatella

4a mine small, of indefinite shape; larvae darkly coloured with obvious feet and head; older larvae live free among spun leaves => 5

4b nu particular small blotch or gallery mines; the larvae are bone-coloured maggots that mine all their life => 6

5a larva: pinacula colourless (the bases of the setae themselves are black) : Cnephasia incertana

5b pinacula black: Cnephasia stephensiana

6a corridor pinnately branched, its main branch overlying the midrib: Liriomyza strigata

6b corridor not or little branched, not pinnate, not associated with the midrib => 7

7a frass, at least partly, in strings; pupation outside the mine: Liriomyza xanthocera

7b frass in grains that are separated by at least their diameter; puparium in the mine, in a, usually lower-surface, pupal chamber: Chromatomyia horticola