22 FRANCIS HEMMING 



it is necessary to search the literature, in order to find where the terms in question were first 

 duly published as generic (or subgeneric) names. In the case of the term " Achivus ", the 

 first author so to publish it was Kirby (1896) and the name Achivus accordingly ranks for 

 nomenclatorial purposes as from that year and is attributable to Kirby by whom it was then 

 published. 



ACHLYODES Hiibner, [1819], Verz. bekannt. Schmett. (7) : 108. Type-species by selection 

 by Butler (1870, Ent. mon. Mag. 7 : 98) : Papilio busirus Cramer, [1779], Uitl. Kapellen 3 

 (22) : 119, pi. 261, figs A, B, C. 



In accordance with the then fashionable " Principle of Elimination " Scudder (1875, 

 Proc. amer. Acad. Arts Sci., Boston 10 : 100) considered that Papilio busirus was ineligible to 

 be the type-species of this genus, and thereupon sought to make Achlyodes fridericus Hiibner, 

 [1819] {Verz. bekannt. Schmett. (7) : 108) type-species in its stead. There was no justification 

 for rejecting the selection of Papilio busirus as type-species, which is perfectly valid. More- 

 over, even if at that time Achlyodes had been without a validly selected type-species, Scudder 's 

 selection of Achlyodes fridericus would have been invalid, for when its name appeared in the 

 Verzeichniss this was only a manuscript species, the name fridericus being then only a nomen 

 nudum. The species concerned remained without a validly published name until in 1832 {in 

 Hiibner, Zutr. z. Samml. exot. Schmett. 4 : 9, pi. [106], figs 611, 612) Geyer validated Hiibner's 

 manuscript name, using it in the same combination {Achlyodes fridericus). 



ACHNA Billberg, 1820, Enum. Ins. Mus. Billb. : 80. Type-species through Section (i) (replace- 

 ment names) of Article 67 : Urbanus phalaenoides Hiibner, [1812], Samml. exot. Schmett. 

 1 : pi. [152]. 



Achna was established by Billberg as a replacement for Helias Fabricius, 1807, and accord- 

 ingly has as its type-species the species which is the type-species of Helias. How it happens 

 that this genus has as its type-species a species bearing a name published after the publication 

 of the name Helias is explained in the note given under that name. 



The name Helias Fabricius is an available name and Billberg was therefore in error in 

 trying to substitute the name Achna for it. The latter is accordingly invalid as a junior 

 objective synonym of Helias Fabricius. 



ACID ALIA Hiibner, [1819], Verz. bekannt. Schmett. (2) : 31. Type-species by selection by 

 Scudder (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 101) : Papilio niphe Linnaeus, 1767, 

 Syst. Nat. (ed. 12) 1 (2) : 785. 



The name Acidalia Hiibner is invalid as a junior objective synonym of Argyreus Scopoli, 

 1777, of which the same nominal species is the type-species. 



The taxon represented by the nominal species Papilio niphe Linnaeus is currently identified 

 on taxonomic grounds with that represented by the older-established nominal species Papilio 

 hyperbius Linnaeus, 1763, Amoen. acad. 6 : 408. 



ACLEROS Mabille, [1886], in Grandidier, Hist. phys. nat. pol. Madagascar 18, Lep. 2 : pi. 54. 

 Type-species by monotypy : Cyclopides leucopyga Mabille, 1877, Ann. Soc. ent. Fr. 

 (5) 7, Bull. : lxxii. 



In the text published in 1887 {ibid. 18, Lep. 1 : 347) Mabille again placed only the above 

 species in this genus. 



ACMEPTERON Godman & Salvin, [1889], Biol, centr.-amer., Lep.-Rhop. 2 : 179. Type- 

 species by original designation : Pieris nemesis Latreille, [18 13], in Humboldt, Voy. 

 inUr. Amir., Obs. Zool. 2 : 78, pi. 35, figs 7, 8. 



ACOLASTUS Scudder, 1872, 4th Ann. Rep. Peabody Acad. Sci. 1871 : 71. Type-species by 

 original designation : Hesperia savignyi [correction of savigny] Latreille, [1824], Ency. 

 mith. 9 (Ins.) (2) : 741. 



The name Acolastus Scudder is invalid as a junior homonym of Acolastus Gerstaecker, 1855, 

 MonatsBer. Akad. Wiss. Berlin 1855 : 636. 



The taxon represented by the nominal species Hesperia savignyi Latreille is currently 



