Several taxons belonging to the genus Cordyceps Fr. (Ascomycota, Clavicipitaceae) are studied in detail, on the taxonomical level on the base of recent or older material, including certain types. Cordyceps ditmarii is rehabilitated at the specific rank. Several anamorphic stages are also presented; two new species are created in the genera Hymenostilbe and Polycephalomyces; Isaria sphecophila is combined in the genus Hirsutella. AI: Y BT: Systematics-; Parasites-diseases-and-disorders; Diseases-and-disorders; Microbial-diseases; Land-zones; Palaearctic-region; Eurasia-; United-Kingdom; Europe- Hymenoptera-: Fungal-diseases, Cordyceps-sphecocephala-complex, Pathogen-systematics-and-distribution, Land-zones, Fungal-pathogen-systematics-and-distribution; Ichneumonidae- : Fungal-diseases, Hymenostilbe-ichneumonophila, New-fungal-species, England-, Devon-and-Norfolk, New-species-of-fungal-pathogen; Paravespula-vulgaris ( Vespidae- ) : Fungal-diseases, Polycephalomyces-ditmarii, New-fungal-species, Italy-and-Poland, Czech-Republic, France-, Germany-, Italy-, Poland-, New-species-of-fungal-pathogen ST: Hymenoptera- : Insecta-; Ichneumonidae- : Ichneumonoidea- , Terebrantia- , Apocrita- , Hymenoptera- , Insecta-; Vespidae- : Vespoidea- , Aculeata- , Apocrita- , Hymenoptera- , Insecta- none2005