Lolium rye-grass

Dichotomous table for leafminers

1a larva with well recognisable feet and sclerotised head => 2

1b larva a maggot => 3

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

2a larva whitish, unusually slender: Ochsenheimeria vaccuella

2b larva lemon yellow, not unusually slender: Elachista luticomella

3a larva: mandible with 1 tooth; at the start of the mine (often in a leaf shear) at the outside an egg shell: Hydrellia griseola

3b mandible with 2 or more teeth; no egg shell visible => 4

4a larva: cephalic skeleton of Agromyzinae-type; pupation outside the mine: Agromyza mobilis & A. nigrella *

4b cephalic skeleton of Phytomyzinae-type; pupation within or outside the mine => 5

5a mine partly or wholly in the leaf sheath: Cerodontha denticornis

5b mine entirely in the blade => 6

6a puparium in the mine => 7

6b pupation outside the mine => 11

7a pupaprium: front or rear spiracula penetrate the epidermis => 8

7b puparium not in connection with the outside world => 10

8a larva and puparium with strongly lengthened, fang-shaped, rear spiracula, that are anchored in the leaf tissue: Chromatomyia milii

8b rear spiracula normal => 9

9a puparium shining black; rear spiracula penetrate: Cerodontha muscina

9b puparium orange brown; front spiracula penetrate: Chromatomyia nigra

10a larva: the black warts at the outside of the rear spiracula small, without a “root”: Cerodontha incisa

10b these warts large, with a deep “root”: Cerodontha pygmaea

11a larva and puparium set with transverse rows of long, spinelike papillae: Pseudonapomyza atra

11b larva puparium without such spines => 12

12a larva: rear spiraculum with 3 papillae: Liriomyza flaveola

12b rear spiraculum with 6-8 papillae: Liriomyza phryne

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

Not included in the key: Cylindromorphus gallicus angelini.

mod 9.x.2017