Gaudinia fragile oat
Dichotomous table for leafminers
1a mine starts at an egg shell on the plant; larva: mandible with 1 tooth: Hydrellia griseola
1b oviposition by way of an ovipositor, therefore no egg shell to be seen; mandible with 2 teeth => 2
1c galls, etc => Tables for all parasites per species
2a pupaption within the mine; anterior spiraculum penetrates the epidermis: Chromatomyia nigra
2b pupation exterior: Liriomyza flaveola