Epyris Westwood, 1832 is the largest genus of Bethylidae with more than 300 nominal species and 19 species of Epyris have been recorded in Korea. The Epyris species are small to medium sized (2–10 mm) wasps with the palpal formula 6:3; the median lateral clypeal lobe reduced; pronotum usually longer than wide; notauli and parapsidal furrows present; scutellar pits not connected by a groove; basal vein of the fore wing arising almost at apex of subcostal vein. As results of taxonomic studies on Korean bethylids, Epyris emiae Terayama, a brachypterous species, is first discovered from South Korea. In this presentation, a diagnosis, figures of diagnostic characteristics of E. emiae are provided with a discussion on forewing veins of Korean bethylid genera.

fossil species. It consists of four genera, Caenosclerogibba Yasumatsu, Probethylus Ashmead, Sclerogibba Riggio & De Stefani-Perez and Pterosclerogibba Olmi. Thirteen species of two genera (60% of species worldwide) are known from the Oriental region. However, no species was reported in Cambodia so far. Even though the detailed biology of the sclerogibbids is poorly known, they are ectoparasitoids of the webspinners (Embiidina). From the present study, three species of the family are recognized for the first time from Cambodia: Sclerogibba talpiformis Benoit, S. rapax Olmi and S. impressa Olmi. Diagnoses and photographs for each species are presented.

Members of Bethylidae are widely distributed from the Tropic to the Subarctic regions around the world. The family contains about 2,216 species worldwide, and the majority of recorded species are found from the tropical regions. From the Oriental region, 368 species of 46 genera in four subfamilies has been recorded up to date. Two species are recognized as new to science and three to the fauna of Cambodia and its adjacent countries in the present study. We provide microphotographs and diagnoses of each species with a general introduction of Cambodian bethylids.