28 FRANCIS HEMMING 



ADOPOEA Billberg, 1820, Enum. Ins. Mus. Billb. : 81. Type-species by monotypy : Papilio 

 linea [Denis & Schiffermiiller] , 1775, Ankiindung [sic] eines syst. Werkes Schmett. Wiener 

 Gegend : 160. 



The name Papilio linea [Denis & Schiffermiiller] is currently treated on taxonomic grounds 

 as a junior subjective synonym of Papilio sylvestris Poda, 1761 {Ins. Mus. graec. : 79). 



AECAS Hemming, 1939, Proc. R. ent. Soc. Lond. (B) 8 : 137. Type-species by original designa- 

 tion : Papilio aecas Stoll, [1781], in Cramer, Uitl. Kapellen 4 (29) : 102, pi. 343, figs A, B. 

 Aecas was introduced as a new genus but the purpose of its introduction was to provide the 

 genus with an available name, the name Flaccilla Godman, [1901] (in Godman & Salvin, 

 Biol. centr -amer., Lep.-Rhop. 2 : 593), by which it was then known, being considered to be invalid 

 as a junior homonym of the name Flacilla Koken, 1896 (Jahr B. geol. ReichsAnst. 46 : 92). In 

 1953 however the Fourteenth International Congress of Zoology introduced the so-called 

 "One-Letter difference Rule" for determining generic homonymy and that Rule has now been 

 embodied in the Code as Article 57(d). Under this Rule the words "Flacilla" and "Flaccilla", 

 if used as generic names, are not homonyms of one another. Accordingly, contrary to what was 

 believed in 1939 Flaccilla Godman, [1901], is not a homonym of Flacilla Koken, 1896, but is on 

 the contrary an available name. It must therefore be restored as the name for the present 

 genus, the name Aecas Hemming, 1939, being sunk therefore as a junior objective synonym. 



AEGIALE Felder (C.) & Felder (R.), i860, Wien. ent. Monats. 4 : no. Type-species by 

 monotypy : Aegiale kollari Felder (C.) & Felder (R.), i860, ibid. 4 : in, pi. 2, fig. 3 $. 



Scudder in 1875 (Proc. amer. Acad. Arts Sci., Boston 10 : 103) sought to reject this generic 

 name on the ground that it was a junior homonym of the name Aegialia Latreille, 1807 (Gen. 

 Crust. Ins. 2 : 96), but (as explained above in the discussion of the name Aecas Hemming) 

 Scudder 's action was incorrect under the " One-Letter Difference Rule " now embodied in 

 Article 57(d) of the Code. Accordingly, the name Aegiale Felder & Felder is a nomenclatori- 

 ally available name and the name Acentrocneme which Scudder introduced as a substitute for 

 it is invalid as a junior objective synonym. 



The taxon represented by the nominal species Aegiale kollari Felder & Felder is currently 

 identified subjectively on taxonomic grounds with that represented by the nominal species 

 Castnia hesperiaris Walker, 1856 (Cat. Lep.-Het. Brit. Mus. 7 : 1583). 



AEGRIS Holland, 1894, Ent. News 5 : 27 (an Incorrect Subsequent Spelling of Eagris Guenee 

 1863). 



AELLA Mabille, 1904, Gen. Ins. 17 (B) : 140. Type-species by monotypy : Pamphila 

 dryops Mabille, 1883, Ann. Soc. ent. Belg. 27, C.R. : lxix. 



The taxon represented by the nominal species Pamphila dryops Mabille is currently identi- 

 fied subjectively with the older-established nominal species Urbanus mys Hiibner, [1808] 

 (Samml. exot. Schmett. 1 : pi. [158]). 



AEMONA Hewitson, [1868], ///. exot. Butts 4 : [64]. Type-species by monotypy : Clerome 

 amathusia Hewitson, 1867, Trans, ent. Soc. Lond. (3) 5 : 566. 



AEOLA Billberg, 1820, Enum. Ins. Mus. Billb. : 78. Type-species by selection by Hemming 

 (1933, Entomologist 66 : 197) : Papilio iris Linnaeus, 1758, Syst. Nat. (ed. 10) 1 : 476. 



The name Aeola Billberg is invalid as a junior objective synonym of Apatura Fabricius, 

 1807. 



A EON US Mabille, 1904, Gen. Ins. 17 (C) : 151 (an Incorrect Subsequent Spelling of Oeonus 

 Godman, [1900]). 



AERIA Hiibner, 18 16, Verz. bekannt. Schmett. (1) : 9. Type-species by selection by Scudder 



(1875, Proc. amer. Acad. Arts Sci., Boston 10 : 103) : Papilio aegle Fabricius, 1777, Gen. 



Ins. : 255. 

 AERNAUTA Berge, 1842, Schmetterlingsbuch : 19, 106-109. Type-species by selection by 



Hemming (1934, Entomologist 67 : 38) : Papilio machaon Linnaeus, 1758, Syst. Nat 



(ed. 10) 1 : 462). 



