What is "ocrasa"

Ocrasa is a genus of moths belonging to the family Pyralidae. The genus is mostly treated as a synonym of Hypsopygia. If considered valid, the genus includes many species which were formerly included in Herculia. In addition, the proposed genus Orthopygia, which some authors consider a separate (and sometimes monotypic) lineage is here merged with Ocrasa. The latter two genera are also mostly merged with Hypsopygia however.