1a small blotch with an excision of 2 mm: Incurvaria praelatella

1b blotch mine, without an excision; if there is a preceding corridor it is broad, and not longer than the blotch => 2

1c corridor, often strongly widenend in the end => 6

1d fleck mine; larva in a lobe case => 12

1e gallen etc => Tabellen voor alle parasieten per soort

2a mine large (1-3 cm) => 3

2b mine quite small => 4

3a mine upper-surface, greenish, later brownish; frass absent; pupa in the mine: Coptotriche heinemanni

3b mine full depth; frass in big lumps; pupation outside the mine: Fenella nigrita

4a larva: pinacula colourless (only the base of the setae is black): Cnephasia incertana

4b pinacula black => 5

5a larva: abdomen end with an anal comb: Cnephasia asseclana

5b no anal comb present: Cnephasia stephensiana

6a at the start of the mine a globular shining egg shell; in the corridor frass in a central line; larva with chitinised head => 7

6b no egg shell at the start of the mine; frass in the corridor in two rows along the sides; larva a maggot: Agromyza idaeiana

7a first part of the initial corridor strongly wound, intestine-like => 8 **

7b entire corridor in wide loops => 9

8a larva pupates in a cocoon within the mine: Ectoedemia agrimoniae

8b pupation outside the mine: Ectoedemia arcuatella

9a mine a distinct corridor throughout its length => 10

9b final part of the corridor widened into a blotch: Stigmella aeneofasciella

10a mine long, slender, often crossing itself; frass line thread thin; no living larvae in the period December-April: Stigmella splendidissimella

10b mine shorter and less slender, rarely crossing itself; frass line wider; living larvae also in December-April => 11

11a corridor unusually short: Stigmella auromarginella

11b corridor of normal length: Stigmella aurella; possibly also Stigmella thuringiaca

12a case brown; lobes cut from the upper epidermis; mouth angle 0-10°: Coleophora violacea

12b case whitish; lobes cout from the lower epidermis; mouth angle 20-30°: Coleophora potentillae