Hydrorybina pryeri is a moth in the Crambidae family. It was described by Butler in 1881. It is found in Japan and Russia. The wingspan is 14–19 mm. Adults are pale bronze-brown, washed with grey. The wings are crossed by an arched discal black line. The center of costal border, the area between the cell and the discal line of the forewings are rust-red. There is a blackish arched line across the basal third and a small blackish disco-cellular lunule. The hindwings are sordid white, with an arched slender dusky discal line.