Adelpha serpa, the celerio sister, is a butterfly of the Nymphalidae family. It was described by Jean Baptiste Boisduval in 1836. It is found from Mexico to Brazil. The habitat consists of rainforests and cloudforests at elevations ranging from 300 to 2,000 meters.
- A. s. serpa (south-eastern Brazil to Paraguay, north-eastern Argentina)
- A. s. celerio (Bates, 1864) (Guatemala, Mexico to north-western Venezuela)
- A. s. diadochus Fruhstorfer, 1915 (Peru, Guyana, French Guiana, Brazil: Pará)
- A. s. duiliae Fruhstorfer, 1913 (western Ecuador)
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