Hemming (1967) stated:-
The taxon represented by the nominal species Papilio steropes is currently treated subjectively on taxonomic grounds as representing at the species-level the same taxon as that represented by the nominal species Papilio morpheus Pallas, 1771 (Reise durch versch. Prov. Russ. Reichs 1 : 471). At the subspecies level, however, these nominal species are considered to represent distinct subspecies of the collective species Heteropterus morpheus (Pallas), the nominate subspecies, morpheus Pallas, occurring in Southern Russia (type-locality : "in fruticetis circa Samaram"), and the subspecies steropes [Denis & Schiffermüller] in Western Europe (type-locality : Vienna) (see Hemming, 1960, Annot. lep. (2) : 66-67).
Scudder (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 150-151) caused some confusion in the use of the generic name Cyclopides by rejecting the type-selection of Papilio steropes [Denis & Schiffermüller] made by Butler in 1870 on the ground that another nominal species considered subjectively to represent the same species had already been made the type-species of a different genus, namely Heteropterus Duméril, 1806. Basing himself on these erroneous premises Scudder went on to select as the type-species of Cyclopides the nominal species Papilio metis Linnaeus, 1764 (Mus. Lud. Ulr. : 325). The taxon represented by this nominal species occurs in South Africa and belongs to an entirely different group in the family Hesperiidae. This mistake of Scudder's led a number of authors into a similar error. In consequence, the "metis-Group" remained without a name until in 1906 Tutt established the nominal genus Watsonia with Papilio metis as type-species. Unluckily, that name was invalid under the Law of Homonymy, and this group remained without a valid name of its own until in 1934 I established the nominal genus Metisella with the above species as type-species.
The higher classification used here follows Lamas (2008).
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