Key to Chlorissa species of the Baikal region

1. In male genitalia (Figs. 35F, 35G, 35J, 36K, 36L) aedeagus dorsally with broad semicircular lobe in medial part near anterior opening (Figs. 36G, 36H); vinculum rather angled: in lateral view anterior parts of its arms and axe of saccus form angle <90° (Figs. 27E, 27F). Female genitalia— Fig. 38G......................................... C. obliterata (Walker, 1863)

- In male genitalia (Figs. 35D, 35E, 35H, 35I, 36I, 36J) aedeagus dorsally without conspicuous lobe in medial part (Figs. 36C, 36D); vinculum less angled than in C. obliterata: in lateral view anterior parts of its arms and axe of saccus form angle> 90° (Figs. 36A, 36B). Female genitalia— Fig. 38F. ........................................ C. viridata (Linnaeus, 1758)