Revision of the western Palearctic species of Dusona Cameron (Hymenoptera, Ichneumonidae, Campopleginae)

The western Palearctic species of Dusona Cameron are revised. Fifteen new synonymies are indicated, and lectotypes are designated for five taxa. In a checklist, 109 valid names of identified species, 23 nomina dubia and 110 junior synonyms (including five infrasubspecific names) are listed. A key is provided for 109 species. Detailed descriptions of 46 species are given, among these ten new species (63 trans-palearctic species having been described by Hinz & Horstmann 2004).