| Oncopeltus (Erythrischius) Stål, 1874 |
| Oncopeltus (Erythrischius) aulicus (Fabricius, 1775) |
| Oncopeltus (Erythrischius) cingulifer Stål, 1874 |
| Oncopeltus (Erythrischius) fasciatus (Dallas, 1852) |
| Oncopeltus (Erythrischius) sandarachatus (Say, 1832) |
| Oncopeltus (Erythrischius) semilimbatus Stål, 1874 |
| Oncopeltus (Erythrischius) unifasciatellus Slater, 1964 |
| Oncopeltus (Oncopeltus) Stål, 1868 |
| Oncopeltus (Oncopeltus) guttaloides Slater, 1964 |
| Oncopeltus (Oncopeltus) sanguinolentus Van Duzee, 1914 |
| Oncopeltus (Oncopeltus) sexmaculatus Stål, 1874 |
| Oncopeltus (Oncopeltus) varicolor (Fabricius, 1794) |
| Orsillinae Stål |
| Orsillini Ashlock |
| Oxycareninae Stål |
| Ozophora Uhler, 1871 |
| Ozophora atropicta Barber, 1939 |
| Ozophora atropictoides Slater & Baranowski, 1995 |
| Ozophora baliocoris Slater, 1983 |
| Ozophora baranowskii Slater & O'Donnell, 1979 |