The species of the genus Euagathis Szépligeti (Hymenoptera, Braconidae, Agathidinae) from Thailand are revised. Eight species are treated, three new species are described, i.e. Euagathis breviantennata sp.n., E. setosimaculata sp. n. and E. pallitarsis sp. n. Disophrys sogdiana Fahringer, 1937, D. chinensis Fahringer, 1937, and Euagathis sentosus Chen & Yang, 1995, are new junior synonyms of Euagathis chinensis (Holm‑gren, 1868). Euagathis guangxiensis (Chen & Yang, 2006) is a new combination. Lectotypes are designated for Disophrys sogdiana Fahringer, 1937, and D. chinensis Fahringer, 1937. A dichotomous illustrated key to species is presented; links to electronic interactive keys and to distribution maps are also included.