It is found in the Neotropical ecozone S.E. Brazil (Bahia, Minas Gerais, Espirito Santo, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul), Paraguay)
Xanthocastnia is a genus of moths within the family Castniidae containing only one species, Xanthocastnia evalthe, which is widespread in the Neotropical ecozone, ranging from southern Mexico to southern Brazil.