A new species of butterfly from the Serranía del Perijá, Cesar, Colombia, is describedherein. A mountain system where the principal characteristic of the high altitudelands is the biogeographic isolation from other Andean mountain systems such asthe Sierra Nevada de Santa Marta and the Sierra de Mérida in Venezuela. This newspecies is close to Forsterinaria punctata, but shows clear differences in the wingpattern coloration and the male genitalia morphology