Three new species of (Hypocreales, Ophiocordycipitaceae) and a new host record for from China.

, a genus of invertebrate-pathogenic fungi in the family Ophiocordycipitaceae (order Hypocreales), is globally distributed. Over 300 species have been described and accepted as members of the genus. This study introduces three new species from China: , , and . Remarkably, , hosted on flies (Muscidae, Diptera), is characterized by its larger perithecia and longer secondary ascospores. is also introduced based on morphological distinctions from closely related species. produces dark brown superficial perithecia with an asexual morph at the apex and does not break into part-spores. Phylogenetic analyses using six loci (LSU, ITS, SSU, , , and ) robustly support the placement of these new species within the . Additionally, we report a new host record for . Detailed descriptions, illustrations, color photo plates, and a phylogenetic tree are provided.