Promethis

Ba, Yi-Bin & Ren, Guo-Dong, 2009, Taxonomy of Promethis Pascoe (Coleoptera, Tenebrionidae) on Hainan Island, China, Zootaxa 2064, pp. 27-38 : 27-28

Key to species of Promethis in Hainan Island, China

1 Anal segment without deep groove apically................................................................................................................. 2

- Anal segment with deep groove apically; frontoclypeal suture shallowly concave; protibiae incurved, inner margin with one obvious tooth centrally; head densely punctate; pronotum similarly densely punctate; elytral intervals con- vex; length 18.0–28.0 mm ......................................................................................................................... P. rectangula

2 Anterior margin of profemora with dense hairs in male.............................................................................................. 3

- Anterior margin of profemora without dense hairs in male.......................................................................................... 4

3 Elytral rows of punctures feeble, intervals with fine and sparse granules; protibiae strongly incurved, inner margin with one obvious tooth at basal 1/ 3 in male; length 28.0–36.0 mm .......................................................... P. vietnamica

- Elytral rows of punctures strong; protibiae weakly incurved, inner margin obtusely extruded at basal 1/3, but with-

out obvious tooth; length 24.0–25.0 mm. ................................................................................................ P. guangxiana 4 Anterior margin of profemora obviously bordered from base to middle in male, the border without tooth apically .. 5

- Anterior margin of profemora obviously bordered from base beyond middle in male, and the border with one sharp tooth apically; anterior angles of pronotum roundly obtuse; elytral rows of punctures feeble, punctures on rows weaker or absent apically, intervals flat; length 20.0–30.0 mm.......................................................... P. punctatostriata

5 Mentum with dense and erected yellow mane.............................................................................................................. 6

- Mentum without manes, at most with sparse hairs.......................................................................................................7

6 Elytra with rows of punctures; intervals flat, finely punctate, each puncture with one obvious seta; metatibiae obtusely expanded interiorly near the middle; length 18.0–23.5 mm ....................................................... P. evanescens

- Elytra with striae of punctures; intervals convex, finely punctate, but puncture without seta; metatibiae straight, only weakly incurved apically; length 24.0–28.0 mm ................................................................................. P. oshimana

7 Protibiae strongly incurved in apical 1/4, outer margin strongly dilated and bordered apically; pronotum square, disc coarsely and densely punctate, intervals of punctures less than punctures diameter; elytral striae deeply concave, intervals somewhat convex, and with sparse white hairs; length 11.0–16.0 mm ................................. P. crenatostriata

- Protibiae weakly incurved, apices simple, and outer margin unbordered .................................................................... 8

8 Inner margin of mesotibiae with obtuse tooth centrally in male; pronotum sparsely punctate on middle and densely so on sides; elytral rows of punctures weak, intervals flat and lackluster; length 23.5–28.0 mm .. P. valgipes valgipes

- Mesotibiae simple, inner margin without obtuse tooth................................................................................................. 9

9 Protibiae strongly incurved in apical 1/ 4 in male; terminal segment of antennae rectangular; pronotal punctures rounded, dense and joined on middle; elytral intervals very convex.......................................................................... 10

- Protibiae somewhat incurved in apical 1/ 4 in male; terminal segment of antennae nearly oval; pronotal punctures fine but distinct; elytral intervals somewhat convex, and finely punctate; length 16.0–21.0 mm .......... P. sinuatocollis

10 Terminal segment of metatarsus length equal to the sum of basal 3 segments; pronotal punctures rounded, dense, and joined; base of 1st abdominal segment without long groove; length 22.0 mm ......................... P. crassihornis sp. nov.

- Terminal segment of metatarsus length equal to the sum of basal 2 segments; pronotal punctures absent on sides; base of 1st abdominal segment with a long groove; length 18.0–23.0 mm ................................................ P. pauperula