Rupela leucatea is a moth in the family Crambidae. It was described by Philipp Christoph Zeller in 1863. It is found in Puerto Rico, Jamaica, Cuba, Hispaniola, Martinique, Antigua, Mexico, Guatemala, Nicaragua, Panama, Honduras, Trinidad, Venezuela, the Guianas, Brazil, Argentina, Paraguay and Peru.
The wingspan is 22âÂÂ38 mm for males and 25âÂÂ53 mm for females. The wings are shining white.
The larvae feed on Echinochloa polystachya.