Tilia lime
(For a dichotomous table for galls on Tilia by Hans Roskam click here)
Dichotomous table for leafminers
1a blotch mine, from which eventually an excision is made that is hardly smaller than the mine itself => 2
1b lower surface tentiform mine => 3
1c blotch mine (no excision) => 4
1d corridor mine => 6
1e fleck mine => 8
1f galls, etc. => Tables for all parasites per species
Dichotomous table for leafminers
1a blotch mine, from which eventually an excision is made that is hardly smaller than the mine itself => 2
1b lower surface tentiform mine => 3
1c blotch mine (no excision) => 4
1d corridor mine => 6
1e fleck mine => 8
1f galls, etc. => Tables for all parasites per species
2a larva: each thorax segment with a black dorsal shield: Incurvaria koerneriella or pectinea
2b onlt pronutum with a black shield; meso- and metanotum with a small dark spot: Incurvaria masculella
3a frass in a lump in one corner of the mine: Phyllonorycter issikii
3b frass scattered in the mine: Phyllonorycter messaniella
4a on the oviposition spot (usually the leaf tip) a shining black drop of dried secretion: Trachys minutus
4b no such drop => 5
5a mines in May, mostly in the canopy; mines flat, not rolled in at the margin; rarely more than 1 mine per leaf; frass pellets about 0.5 mm long: Parna apicalis
5b mines in June-July, mainly on suckers; mine somewhat inflated, rolled in at the margin; often several mines per leaf; frass pellets up to 2 mm long: Parna tenella
6a a contorted gallery of about 2 cm; larva remains in the mine until just before pupation: Stigmella tiliae
6b mine < 1 cm; older larvae live free => 7
7a mine at the leaf margin (generally in the tip of the leaf): Roeslerstammia erxlebella
7b hooklike mine in a vein axil: Bucculatrix thoracella
8a lobe case: Coleophora violacea
8b tubular leaf case: Coleophora siccifolia
8c pistol case: Coleophora anatipenella
Not included in the key: Bucculatrix albedinella; Coleophora ahenella.