Prionopaltis sericea is a moth in the Crambidae family. It was described by Warren in 1892. It is found in India (Himachal Pradesh). The wingspan is about 24 mm. The forewings are glossy fuscous, the first line very indistinct and slightly oblique. The second line is also indistinct, bounded below the costa by a pale yellowish-white blotch. The hindwing have the second line repeated, and followed by a pale area throughout its course.