Pterostoma griseum (Bremer, 1861):

Russian Far East, Primorsky Krai, Ussuriisk envir., Kaimanovka, at UV-light, 11-VIII-1972, leg. E.Berlov The forewing length is 23 mm. det. L.Lehmann

Russian Far East, Primorsky Krai, Ussuriisk envir., Kaimanovka, at UV-light, 8-VIII-1972, leg. E.Berlov The forewing length is 31 mm. det. E.Berlov