Key to genera of Histerini recorded from Brazil

1 Outer subhumeral stria complete.................................................... Margarinotus Marseul, 1854

- Outer subhumeral stria incomplete or absent................................................................ 2

2 Mesoventrite truncated or subtly emarginated.......................................... Atholus C. Thomson, 1859

- Mesoventrite distinctly emarginated...................................................... Hister Linnaeus, 1758