The present study assessed the diversity of the exclusive egg parasitoid subfamilies under Platygastridae, associated with rice ecosystems, in north-central Kerala, India. The study results reflected an extremely rich and diverse parasitoid assemblage. A preliminary analysis at the species level indicated the presence of more than 100 species under 28 genera of Scelioninae, Teleasinae and Telenoininae (Platygastridae, exclusive of Platygastrinae). Since a detailed systematic treatment of all the species collected during the study was too large to include in this report, a total of 50 species, under two subfamilies (45 under Scelioninae and 5 under Teleasinae) are dealt here along with dichotomous keys as identiﬁcation aids. The species belonging to the subfamily Telenominae and a few large genera like Gryon Haliday and Scelio Latreille under Scelioninae and Trimorus Förster (Teleasinae) will be dealt with in detail separately as part 2 of this volume at a later instance.