A review of Fernando Poo's Rhopalocera collection in the Museo Nacional de Ciencias Naturales (MNCN) in Madrid led us identify 172 species (14 Papilionidae, 18 Lycaenidae, 29 Pieridae, 94 Nymphalidae, and 17 Hesperiidae), of which 33 are new records for Bioko Island. To identify certain specimens in the genus Graphium, the genitalia of several individuals selected from among specimens captured on different dates and in various locations were examined and all were unequivocally seen to belong to the species Graphium policenes policenes. Therefore, we consider that the distribution of G. biokoense on Bioko Island should be revised.