Korean: (Ohara and Paik, 1998).
Key to the Korean species of the genus Hypocaccus
1 (2) Pronotum smooth, or finely punctate laterally. Meso-metasternal suture without crenate line. ................ Subgenus Baeckmanniolus Reichardt
..................... H. (B.) varians (Schmidt, 1890)
2 (1) Pronotum coarsely punctate. Meso-metasternal suture with strong crenate line. ................ Subgenus Hypocaccus Thomson
3 (4) Frontal disk of head densely covered with coarse rugae. Mesosternal marginal stria interrupted at middle. .............. H. (H.) subaeneus (Schmidt, 1890)
4 (3) Frontal disk of head with 1 or 2 transverse impressions. Mesosternal marginal stria complete.
5 (6) Surface of elytra smooth on basal half. .............. H. (H.) sinae (Marseul, 1862)
6 (5) Surface of elytra coarsely punctate on basal half. ..... H. (H.) lewisii (Schmidt, 1890)
Japan (Ohara, 1994)
Key to the Japanese species of the genus Hypocaccus
1(2) Pronotum smooth, at least finely punctate laterally. Meso-metasternal suture without crenate line. .................. Subgenus Baeckmainnolus Reichardt, 1926
........................................................... H. varinanus (Schmidt, 1890)
2(1) Pronotum coarsely punctate. Meso-metasternal suture with strongly crenate line. ................................................................. Subgenus Hypocaccus
3(4) Pygidium with impunctate area, which is divided by coarsely punctate mid line. ......................................................... H. axeli Kryzhanovskij, 1976
4(3) Pygidium evenly punctate wholly, or the punctures becoming finer apically, mid line without coarse punctures.
5(6) Frontal disk of head densely covered with coarse rugae. Mesosternal marginal stria interrupted at middle. ........................... H. subaenus (Schmidt, 1890)
6(5) Frontal disk of head with one or two tranverse rows. Mesosternal marginal stria complete.
7(10) Surface of elytra smooth on basal half.
8(9) Sutural elytral stria united with marginal elytral stria. ............................. ................................................................ H. sinae (Schmidt, 1890)
9(8) Sutural elytral stria not united with marginal stria ................................. ........................................................ H. akanensis M. Ôhara, sp. nov.
10(7) Surface of elytra coarsely punctate on basal half. .................................. ............................................................. H. lewisii (Schmidt, 1890)
Another species, H. ainu, has been recorded from Japan.