Key to the species of the genus Amarysius Fairmaire, 1888

1 Elytra red, with wide black central area.................................................................... 2

1’ Elytra without wide black central area, at most with narrow black sutural lin...................................... 4

2 Last (5 th) visible male abdominal sternite evenly rounded (Fig. 12); body wider, elytra in males and in females usually 2.8–2.9 times longer than humeral width, with sides diverging posteriorly; pronotal surface represented by regular honeycomb sculpture - regular cells in males and in females, without smooth plate in the middle........................................ 3

2’ Last (5 th) visible male abdominal sternite shallowly emarginated; body narrow, elytra usually about 3 times longer than humeral width, male elytra with parallel sides; pronotum with very dense punctation, without honeycomb sculpture; with small smooth plate in the middle; 10–14 mm ....................................... A. duplicatus Tsherepanov, 1980 (Figs. 13–14) Distribution: south of West and East Siberia, Far East Russia, North Kazakhstan, Mongolia, North China.

3 Male antennae usually much shorter, it is always about 1.2–1,1 times longer than body (Figs. 1–2); penis narrow (Fig. 5); parameres elongated (Fig. 6); 8–15 mm .................................... A. altajensis (Laxmann, 1770) (Figs. 1–4) Distribution: south of western and eastern Siberia, Far East Russia, North Kazakhstan, Mongolia, North and Central China.

3’ Male antennae usually much longer, it can be about 1.5 times longer than body in certain specimens; penis wide (Fig. 10); parameres short and wide (Fig. 11); 13–19 mm ...................... A. coreanus (Okamoto, 1924) stat. rest. (Figs. 7–9) Distribution: Korean Peninsula

4 Elytra totally red, without narrow black sutural line; 13–20 mm ....................... A. sanguinipennis (Blessig, 1872) Distribution: east of Central Russia (one specimen was collected near Izhevsk, Udmurtia), south of West and East Siberia, Far East Russia, North Kazakhstan, Mongolia, North and Central China, Japan.

4’ Elytra red, with narrow black sutural line.................................................................. 5

5 Prothorax with well-developed lateral tubercles; pronotum with a pair of central swellings......... A. suturalis (Pic, 1906) Distribution: Far East Russia, North-East China.

5’ Prothorax without lateral tubercles; pronotum without swellings; 12–15 mm .................. A. minax Holzschuh, 1998 Distribution: Central China.