Form slender; vestiture scaly; clypeus rough, with a superior arched ridge, infra-clypeal plate prominent; wings very wide, entire; apex determinate; external margin regularly rounded. Labial palpi short. Legs slender and apparently unarmed. Eyes naked, unlashed. Abdomen hardly exceeding secondaries. Body untufted on the dorsal line. The type and only species is snow white, with a large, golden, metallic, trigonate, median patch on primaries above, leaving of median vein and a reddish stain near the base of the wing.

1. Poetica Gr. Arizona.

This is one of the prettiest moths allied to Plusia in our fauna.

This paper is the result of my studies upon Mr. Neumoegen's collection, commenced last autumn, but interrupted and delayed by my bad health.