Phalaris canary grass
Incl. Phalaroides.
(For a dichotomous table for galls on Phalaris by Hans Roskam click here)Dichotomous table for leafminers
1a larva with chitinised head; in narrow corridor segments the frass in a more or less narrow central line => 2
1b larva a maggot; in narrow segments the frass in two rows => 3
1c galls, etc => Tables for all parasites per species
Dichotomous table for leafminers
1a larva with chitinised head; in narrow corridor segments the frass in a more or less narrow central line => 2
1b larva a maggot; in narrow segments the frass in two rows => 3
1c galls, etc => Tables for all parasites per species
2a file Elachista species: E. abifrontella, E. argentella, E. humilis, E. maculicerusella, E. pomerana
3a larva: mandible with 1 tooth; rear spiracula pointed: Hydrellia griseola
3b mandible with 2 or more teeth; rear spiraculum otherwise => 4
4a mine begins with a, usually upper-surface, corridor in the blade, descending into the inside of the leaf sheath; there also the puparium: Cerodontha denticornis
4b mine entirely in the blade => 5
5a puparium within the mine => 6
5b pupation outside the mine => 10
6a puparium orange brown: Chromatomyia nigra
6b puparium metallic black zwart => 7
7a puparium anchored in the mine with a strand of silk => 8
7b puparium without a thread, glued in the mine with dried frass => 9
8a larva: the black warts at the outside of the rear spiracula small, without a ‘root’: Cerodontha incisa
8b these warts large, with a deep ‘root’: Cerodontha pygmaea
9a larva: rear spiracula touching each other: Agromyza albipennis
9b rear spiracula well separated: Cerodontha phalaridis
10a larva bright yellow => 11
10b larva white to amber => 12
11a larva: front spiraculum with 6 papillae; papillae of rear spiraculum normal: Liriomyza flaveola
11b front spiraculum with ca. 15 papillae; papillae of rear spiraculum with contorted openings: Cerodontha phalaridis
12a larva and puparium with on each segment a transverse row of spinelike papillae, about as long as the width of the segments: Pseudonapomyza atra
12b no such spines => 13 *
13a larva: rear spiracula touch each other: Agromyza albipennis
13b rear spiracula separated by at least 3 times their diameter => 14
14a larve: mandible with 3 teeth; abdominal segment 8 dorsally spinulose over its entire length: Agromyza nigrociliata
14b mandible with 2 teeth; abdominal segment 8 dorsally spinulose only near its anterior and posterior border: Agromyza nigrella / A. mobilis
* See also the key to grass-inhabiting Agromyza larvae.
Not included in the key: Cerodontha zoerneri; Chromatomyia fuscula; Cnephasia incertana; Cosmopterix orichalcea.