* Opius (Tolbia) caesus Haliday, 1837

Opius caesus Haliday, 1837: 215 .

Opius (Tolbia) caesus: Fischer, 1972: 347 .

Synonyms. Opius aquaticus Muesebeck, 1967; Opius hydrelliae Muesebeck, 1933; Opius hydrellianus Fischer, 1971 a; Opius punctiventris Thomson, 1895; Opius subtilis Szépligeti, 1898 .

Distribution in Turkey. Edirne, Balikesir, Kirklareli (Fischer & Beyarslan, 2005a).

Hosts. Diptera . Agromyzidae: Phytomyza primulae Robineau-Desvoidy, 1851 . Ephydridae: Hydrellia cochleariae Haliday, 1839; Hydrellia griseola (Fallén, 1813) . Drosophilidae: Scaptomyza graminum (Fallén, 1823) .

Distribution. Nearctic, Oriental, Palaearctic. Austria, Bulgaria, Czechoslovakia, Denmark, Finland, France, Germany, Hungary, Iceland, Ireland, Italy, Lithuania, Nepal, Poland, Romania, Russia, Spain, Sweden, Switzerland, Syria, Tajikistan, Turkey, U.S.A., United Kingdom, Yugoslavia, Serbia.