Trisetum yellow oat-grass

Dichotomous table for leafminers

1a larva with feet and chitinised head => 2

1b larva a maggot => 4

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

2a larva grey green with pale brown head: Elachista pullicomella

2b larva dirty white with black head => 3

3a larva: prothoracal shield entirely black: Elachista freyerella

3bprothoracal shield with two black length lines: Elachista pollinariella

4a puparium in the mine; narrow corridor with rather large, widely separated frass grains: Chromatomyia nigra

4b pupation outside the mine => 5

5a larva solitary; cephalic skeleton of Phytomyzinae-type; mine narrow, frass grains distinct: Pseudonapomyza atra

5b larva communal; cephalic skeleton of Agromyzinae-type; frass greenish, deliquescent: Agromyza nigrella *

* See also the key to grass-inhabiting Agromyza larvae.

Not included in the key: Cerodontha alpina, incisa; Chromatomyia opacella; Elachista albifrontella, maculicerusella.

mod 9.x.2017