Tethea or (Denis et Schiffermüller, 1775):

E.Siberia, 10 km E Irkutsk, at light, 7-VII-2006, leg. E.Berlov The forewing length is 17 mm.

E.Siberia, lake Baikal, cape Bolshoi Solontsovyi, Nature Reserve "Baikalo-Lenskyi", Baikalskyi Mts. ridge, Mt. Elbyr, 800 m, 31-VII-2005, leg. O.Berlov The forewing length is 18 mm.

E.Siberia, Irkutsk province, Ust-Orda envir., Kharat, at UV-light, 26-VI-1973, leg. E.Berlov det. L.Lehmann