Cynoglossum, hound’s-tongue

1a larva mines from a transportable case, making fleck mines => 2

1b larva mines from the inside => 3

1c galls, etc => 100

2a larva in a helicoidal case: Apterona helicoidella

2b larva in hoary, tubular case: Coleophora pennella

3a mine small, of indefinite shape; older larva lives free among spun leaves: Cnephasia asseclana

3b mine not unusually smal; larve mines till just before pupation => 4

4a corridor from start to end; puparium in the mine; frass in well-spaced grains: Chromatomyia horticola

4b large, in the end brown, blotch without a preceding corridor => 5

4c narrow corridor, followed by a large blotch: Dialectica scalariella

5a larva solitary (always?): Agromyza myosotidis

5b larvae communal; common species: Agromyza abiens

100a Nematoda => 101

100b Acari => 102

100c Coleoptera => 103

100e Diptera => 104

100f Hemiptera => 105

100d Hymenoptera => 106

100g rust fungi => 107

100h smut fungi => 108

100i powdery and downy mildews => 109

100j other causers => 110

103 – Coleoptera

103a Curculionidae: Pachycerus segnis; Rhabdorrhynchus seriegranosus

105 – Hemiptera

105a Tingidae: Dictyla echii

107 – rust fungi

107a Pucciniaceae: Puccinia aegilopis, cerinthes-agropyrina

108 – smut fungi

108a Entylomatales: Entyloma cynoglossi

109 – powdery and downy mildews

109a Erysiphaceae: Golovinomyces cynoglossi

109b Peronosporaceae: Peronospora cynoglossi