The tribe Microteryini Hoffer, 1955 is proposed a junior synonym of Discodini Hoffer, 1954. The genus Aschitus Mercet is newly defined and a key is provided to females of 20 Palaearctic species. In new limits Aschitus includes the genera Anicetellus Szelényi and Viggiania Trjapitzin as junior synonyms, and 18 speeies are transferred to Aschitus as combs. n., viz. submetallicus Szelenyi from Anicetellus, aeneiventris (Walker), barbarus (Dalman), hemipterus (Nikolskaja), lichtensiae (Howard), matritensis (Mercet), triozae (André), zarina (Walker) from Encyrtus, axius (Trjapitzin), carpathicus (Hoffer) (nom. praeocc., = hofferi nom. n.), ilus (Trjapitzin), itylus (Trjapitzin), narzykulovi (Sharipov), problematicus (Hoffer), sugonjaevi (Trjapitzin) from Microterys, carpathicus (Hoffer), mongolicus (Myartseva) and naiacocci (Trjapitzin) from Paraphaenodiscus. Aschitus balcanicus sp. n. is described from Greece and Yugoslavia. Lectotypes are designated for Encyrtus barbarus Dalman, Metallon usticorne Erdös and Microterys nikolskajae Erdös. Aschitus hofferi nom. n. is proposed as a replacement name for Mícroterys carpathicus Hoffer, 1977.