Synonyms and other taxonomic changes
Diphthera Hübner, 
Euglyphia Hübner, 
Noropsis Guenée, 1852
Explanation of Names
Generic name Diphthera
is from Greek meaning "a prepared hide." (1)
1 species in North America.
Larvae feed on a variety of herbaceous plants, shrubs, and trees.
Larvae have potential to become pests of crops such as pecan, soybean, and sweet potato. Larvae apparently toxic; birds have been observed feeding on the larvae and immediately spitting them out.
Hübner, J.  Sammlung exotischer Schmetterlinge 1: pl.(193)