- Noualhieria herbanica Ribes, 1976
- Noualhieria pieltaini Gómez Menor Ortega, 1924
- Noualhieria quadripunctata (Brullé, 1839)
- Nychia limpida Stål, 1860
- Nychia marshalli (Scott, 1872)
- Nychia sappho Kirkaldy, 1901
- Nysius atlantidum Horváth, 1890
- Nysius caledoniae Distant, 1920
- Nysius ceylanicus (Motschulsky, 1863)
- Nysius contiguus Walker, 1872
- Nysius cymoides (Spinola, 1837)
- Nysius ericae (Schilling, 1829)
- Nysius ericae ericae (Schilling, 1829)
- Nysius ericae groenlandicus (Zetterstedt, 1838)
- Nysius eximius Stål, 1858
- Nysius expressus Distant, 1883
- Nysius gloriae Baena & García, 1999
- Nysius graminicola (Kolenati, 1845)
- Nysius graminicola graminicola (Kolenati, 1845)
- Nysius graminicola karaganus Hoberlandt, 1952
- Nysius helveticus (Herrich-Schaeffer, 1850)
- Nysius hidakai Nakatani, 2015
- Nysius huttoni F.B. White, 1878
- Nysius immunis (Walker, 1872)
- Nysius inconspicuus Distant, 1903
- Nysius lacustrinus Distant, 1909
- Nysius nigricornis Kerzhner, 1979
- Nysius pilosulus Horváth, 1904
- Nysius plebeius Distant, 1883
- Nysius senecionis (Schilling, 1829)
- Nysius senecionis senecionis (Schilling, 1829)
- Nysius thymi (Wolff, 1804)
- Nysius thymi latus Wagner, 1958
- Nysius thymi thymi (Wolff, 1804)
- Nysius transcaspicus Wagner, 1958
- Oblongocoris hainanensis Bai, Heiss & Cai, 2020
- Obscuromorpha Göllner-Scheiding, 1987
- Ochetostethus balcanicus Wagner, 1940
- Ochetostethus brachyscytus Reuter, 1891
- Ochetostethus corniger Kerzhner, 1976
- Ochetostethus heissi Magnien, 2006
- Ochetostethus kiritshenkoi Medvedeva, 1972
- Ochetostethus melonii Rizzotti Vlach, 2000
- Ochetostethus nanus (Herrich-Schaeffer, 1834)
- Ochetostethus opacus (Scholtz, 1847)
- Ochetostethus perepelovi Kerzhner, 1976
- Ochetostethus pygmaeus (Rambur, 1839)
- Ochetostethus sahlbergi Wagner, 1952
- Ochetostethus tarsalis (Mulsant & Rey, 1852)
- Ochrochira albiditarsis (Westwood, 1842)