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.

• Jongok Lim(Division of Forest Biodiversity, Korea National Arboretum)
• Massimo Olmi(Tropical Entomology Research Center)
• Il-Kwon Kim(Division of Forest Biodiversity, Korea National Arboretum)
• Seunghwan Lee(Department of Agricultural Biotechnology, Seoul National University)