1a corridor < 1 cm long, full depth; larva, with feet and chitinised head, later lives free => 2

1b corridor > 1 cm, upper-surface; larva, a maggot, until pupation in the mine => 7

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

2a some silk is deposited in the mine, causing some contraction; larval dark => 3

2b no silk in the min that remains completely flat; larval (apart from pinacula) light in colour => 4

3a larva: pinacula colourless (the bases of the setae themselves are black) : Cnephasia incertana

3b pinacula black: Cnephasia asseclana

4a larva: with three dark,length lines => 5

4b no, or just one dark length line => 6

5a prothoracal plate shining black; first pair of thoral feet black: Agonopterix purpurea

5b prothoracal plate not entirely black; first pair of thoracic feet yellowish green: Agonopterix rotundella

6a larva: head light brown: Epermenia chaerophyllella

6b head black: Epermenia aequidentellus

7a mine entirely within the leaf => 8

7b mine runs toward a thick vein; from there the larva descends through the petiole into the root: Napomyza carotae

8a puparium formed inside the mine: Chromatomyia horticola

8b larva leaves the mine prior to pupation => 9

9a larva with frontal appendage => 10

9b no frontal appendage => 11

10a mine a gallery (very common species): Phytomyza chaerophylli

10b blotch mine (occurence on this host probably xenophagy): Phytomyza heracleana

11a larva: anterior spiraculum fist-shaped; fress partly in pearl strings; Central European species: Phytomyza mylini

11b anterior spiraculum with 1-12 papillae; frass in discrete grains; Mediterranean species: Phytomyza ferulae