Lythrum purple loosestrife

Dichotomous table for leafminers

1a corridor mine: Galerucella pusilla

1c fleck mine => 2

1c blotch or tentiform mine => 3

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

2a hole in the mine neatly rond; larva in a lobe case: Coleophora violacea

2b hole not precisely round; larva in a helicoidal case: Apterona paludella

3a mine full depth, with conspicuous folds; older larva lives free in a leaf roll: Calybites phasianipennella

3b mine lower-surface, without folds; larva remains in the mine till winter: Monochroa conspersella

mod 31.i.2018