Cydosia nobilitella, the curve-lined cydosia moth or regal cydosia moth, is a moth of the family Noctuidae. The species was first described by Pieter Cramer in 1779. It is found from southern Florida south to Argentina, and is also found in the Antilles.
The wingspan is 20âÂÂ25 mm
The larvae have been recorded feeding on Spigelia anthelmia.