Ichneumonidae Latreille, 1802
Therion brachypodicum Zhang, Sun & Zhang, 1994
Therion brevicorne (Gravenhorst, 1829)
Therion californicum (Cresson, 1879)
Therion circumflexum (Linnaeus, 1758)
Therion ericae Bauer, 1967
Therion fuscipenne (Norton, 1863)
Therion giganteum (Gravenhorst, 1829)
Therion inusitatum (Brues, 1910)
Therion magnum Dasch, 1984
Therion minutum Dasch, 1984
Therion morio (Fabricius, 1781)
Therion mussouriense (Cameron, 1897)
Therion nigripes Dreisbach, 1947
Therion nigrovarium (Brulle, 1846)
Therion petiolatum (Davis, 1898)
Therion ranti Porter, 1999
Therion rufomaculatum (Uchida, 1928)
Therion sassacus Viereck, 1917
Therion tarsatum (Shestakov, 1923)
Therion tenuipes (Norton, 1863)
Therion texanum (Ashmead, 1890)
Therion unguiculum Gauld, 1978
Therion wileyi Porter, 1999
