Thirty-five species from 7 genera of Tersilochinae (Hymenoptera: Ichneumonidae) occur in Turkey. Of these, 20 species are new records for Turkish fauna. The general distribution and data on the biology of Turkish species are provided. Keys to all European genera and subgenera are given, with a short annotation on the taxonomy, distribution and biology of each genus. ; Thirty-five species from 7 genera of Tersilochinae (Hymenoptera: Ichneumonidae) occur in Turkey. Of these, 20 species are new records for Turkish fauna. The general distribution and data on the biology of Turkish species are provided. Keys to all European genera and subgenera are given, with a short annotation on the taxonomy, distribution and biology of each genus.