Abstract
Three species of the genus Ambositra: A. epicnemia sp. nov., A. bicarinata sp. nov. and A. masneri sp. nov. are described from Eocene Rovno amber. The new combination Ambositra villumi (Brazidec & Vilhelmsen) comb. nov. is suggested for the extinct diapriid wasp Basalys villumi described from Baltic amber. The female of A. villumi is described. A detailed illustration of the single extant species Ambositra famosa Masner and the original illustrated key for all known Ambositra species is given. The diagnosis of the genus Ambositra is clarified.
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