Key to the Australian Species of Paratrichapus Scott

(modified from Souza-Gonçalves et al., 2018)

1. Metatibia with fewer than 10 spines; pronotum much darker in colour than reddish elytra with somewhat finer and slightly sparser punctation; interspaces smooth and shiny, those on pronotum with a metallic sheen; Christmas Island ................................................................................. .. P. christmasensis Souza-Gonçalves et al.

- Metatibia with more than 10 spines; pronotum, IF with metallic sheen, THEN not darker than elytra.................... 2

2(1). Elytral punctation very coarse and dense; pronotal punctation much finer and sparser, and interspaces with distinct metallic sheen; northern QLD.................................................... P. metallonotum Souza-Gonçalves et al.

- Elytral punctation finer and sparser; pronotum without metallic sheen............................................ 3

3(2). Posteriormost portion of elytra with dense vestiture of erect, stout setae; length at least 2.00 mm; central coastal NSW............................................................................... P. burwelli Souza-Gonçalves et al.

- Posteriormost portion of elytra with sparse vestiture of slender setae; length always less than 2.00 mm.................. 4

4(3). Metatibia four times as long as wide; pronotal punctation distinctly finer and somewhat sparser than elytral punctation; Tasmania and Victoria to southern QLD................................... P. australis Souza-Gonçalves et al. (Fig. 45–46)

- Metatibia three times as long as wide; pronotal punctation about as coarse and dense as elytral punctation; Lord Howe Island......................................................................... P. peckorum Souza-Gonçalves et al.