Key to Neotropical darkened Liriomyza Mik

1 First flagellomere black (Host-plant: Richardia brasiliensis) [Brazil]..................... L. richardii (Esposito & Prado)

- First flagellomere yellow............................................................................... 2

2 Surstylus undifferentiated; mesophallus short; distiphallus long and oblong, (Host-plant: unknown) [Argentina, Chile]...... ................................................................................... L. australis (Spencer)

- Surstylus present; mesophallus long; distiphallus short and rounded.............................................. 3

3 Wing length 1.9 mm; distiphallus a little longer than wide (Host-plant: unknown) [Brazil]....... L. flaviantennata (Spencer)

- Wing length up to 1.6 mm; distiphallus a little wider than long (Host-plant: Abelmoschus esculentus) [Brazil]..................................................................................................... L. okrae sp. nov.