1a small blotch with a round excision: Incurvaria masculella

1b blotch or tentiform mine: Coptotriche angusticollella

1c corridor, more or less widened towards the end => 2

1d fleck mine => 6

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

2a mine upper-surface, greenish in transparancy; in the first part of the corridor frass in two rows; no egg shell at the begin; larva a maggot: Agromyza idaeiana

2b mine full depth, whitish in transparancy; frass in a central line; at the start of the corridor an egg shell; larva with chitinised head => 3

3a first section of the mine strongly contorted; larva lies venter-upwards in the mine => 4

3b gallery weakly contorted or not at all; larve venter-downwards => 5

4a gallery gradually widening into an elongate blotch; larva with dark head; lowland species: Ectoedemia angulifasciella

4b gallery narrow, abruptly widening into a roundish blotch; larva with pale brown head; mountain species: Ectoedemia rosae

5a first part of the corridor entirely filled with green frass: Stigmella anomalella

5b first part of the corridor with the frass in a narrow, black, central line, leaving clear margins at either side: Stigmella centifoliella

6a spatulate or tubular leaf case: Coleophora gryphipennella

6b lobe case => 7

7a case brown; mouth angle 0°-10°: Coleophora violacea

7b case mostly whitish; mouth angle 30°-50°: Coleophora potentillae