none Cotesia flavipes Cameron is a native parasite in Taiwan. It parasitizes the larvae of Tryporyza incertelus, Chilo suppressalis, Argyroploce schistaceana, Chilotraea infuscatella, Proceras venosatus, Sesamia inferens, and Pseudaletia loreyi. The maturing larvae leave the host body and make cocoons, which are then intermingled to become a cocoon mass. Each cocoon mass contains an average of 31.8 +- 20.6 milky white cocoons. A total of 147 cocoon masses of this parasite was obtained from cane fields in 1974/75 to 1983/84 crop years. Thirty-seven cocoon masses were found on cane leaves at the survey sites. Most of the remaining ones were, however, obtained some days later from the host larvae collected from dead-hearts and reared with cane pieces in the laboratory. The survey showed that the parasitisms of this parasite on the larvae of P. venosatus, C. infuscatslla, S. inferens, and A. schistaceana were 8.5%, 4.4%, 1.9%, and 1.4%, respectively. When monthly surveys were made in 300m-2 plots of F160 autumn cane in 1974/75 to 1983/84 crop years, averages of 0.08 to 3.06 and 0.00 to 3.70 cocoon masses/month were recorded for different crop years and survey months, respectively. However, these means were not statistically different from each other. The survey also disclosed that Aphanogmus fijiensis, Catolaccus sp., and Eurytoma sp. are the hyperparasites of this parasitic wasp.