Key for the identification of the Australian species of Figulus

1. Antenna with 10 antennomeres. Larger species (> 1 cm)....................................................... 2

- Antenna with 9 antennomeres. Smaller species (1 cm or less).......................... F. lilliputanus Westwood, 1855

2. Anterior margin of pronotum with a tubercle (Figs. 1, 12, 16, 20, 25)............................................. 3

- Anterior margin of pronotum trituberculate (Fig. 30).................................... F. trilobus Westwood, 1838

3. Mentum with two bilateral, oval concavities (Figs. 2, 17)...................................................... 4

- Mentum without two bilateral, oval concavities (Figs. 9, 13, 21, 26, 31)......................................... 5

4. Labrum narrow and almost equilaterally triangular (Fig. 16); anterior pronotal angles with a narrow rim (Fig. 16)..................................................................................... … F. regularis Westwood, 1834

- Labrum wide, short, and truncate or shallowly convex (Fig. 1); anterior pronotal angles with a broad horizontal rim (Fig. 1).................................................................................. F. boileaui Bomans, 1989

5. Mentum with two small tubercles at sides near the base (Fig. 13)........................... F. nitens Waterhouse, 1874

- Mentum with two small tubercles present laterally (Figs. 21, 26)............................................... 6

6. Head and pronotum sparsely and finely punctate (Fig. 20); large subcircular punctures on the elytra (Fig. 20)................................................................................................. .. F. rossi Gahan, 1900

- Head and pronotum densely punctate (Fig. 25); small suboval punctures on the elytra (Fig. 25).............................................................................................. F. sulcicollis Hope in Westwood, 1845