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In the course of taxonomic studies on entomogenous fungi, we have been collecting synnematous mycoparasitic fungi occurring on the stromata of Cordyceps spp.from nature and conducted phylogenetic analysis based on the DNA sequences of SSU, LSU rDNA, RPB2, and EF-la regions.Consequently, two new species Polycephalomyces sp.1 and Polycephalomyces sp.2 were recognized for two and 10 isolates, respectively.