Acrotona Thomson

Key to Korean species of the genus Acrotona Thomson

1. Body color relatively darker (Habitus, figs. 1A, D–G); antennomeres compactly close together (Fig. 6A)............... 2

- Body color relatively paler (Habitus, figs. 1B–C); antennomeres moderately or loosely close together (Fig. 5A).......... 6

2. Body length about 2.0 mm (Habitus, fig. 1E).......................................... Acrotona (Acrotona) setaria

- Body length more than 2.0 mm.......................................................................... 3

3. Antennomere 5 subquadrate, slightly transverse (Figs. 6A, 7A)................................................ 4

- Antennomere 5 quadrate, about as long as wide............................................................ 5

4. Macrochaetal arrangement of abdominal tergites II–III 01-03; male sternite VIII with seven macrosetae, posterior margin slightly round, without macrosetae (Fig. 6C)................................................ A. (A.) pseudotenera

- Macrochaetal arrangement of abdominal tergites II–III 01-12; male sternite VIII with more than ten macrosetae, posterior margin truncate, with five macrosetae (Fig. 7C)..................................................... A. (A.) vicaria

5. Body color darker; length less than 2.5 mm (Habitus, fig. 1A); eyes relatively small, about as long as temples..................................................................................................... A. (A.) aterrima

- Body color paler; length more than 2.5 mm (Habitus, fig. 1F); eyes relatively large, slightly longer than temples; elytra paler............................................................................... A. (A.) suspiciosa suspiciosa

6. Body less glossy and convex (Habitus, fig. 1B); labrum with nine macrosetae on each side of mildline (Fig. 2A); abdominal tergite III without anterior macroseta................................................... A. (A.) koreana sp. nov.

- Body distinctly glossy and convex (Habitus, fig. 1C); labrum with eight macrosetae on each side of mildline; abdominal tergite III with anterior macroseta.................................................................. A. (A.) lutulenta