34 FRANCIS HEMMING 



AIDES Billberg, 1820, Enum. Ins. Mus. Billb. : 81. Type-species by selection by Watson 

 (1893, Proc. zool. Soc. Loud. 1893 : 130) : Papilio epitus Stoll, [1781], in Cramer, Uitl. 

 Kapellen 4 (29) : 103, pi 343, figs E, F. 



Under the " One-Letter Difference Rule " (Article 57(d)), Scudder (1875, Proc. amer. 

 Acad. Arts Sci., Boston 10 : 106) was in error in rejecting the name Aides Billberg as a junior 

 homonym of Aidos Hiibner (the name of a genus of moths), which he misdated 1816. (Actual- 

 ly, the latter name was not published until 1820 (Verz. bekannt. Schmett. (12) : 191) ; thus, if 

 the names Aides and Aidos had been homonyms of one another, difficulty would have risen 

 in determining the relative priority to be accorded to these names. 



AILUS Billberg, 1820, Enum. Ins. Mus. Billb. : 81. Type-species through Section (i) (replace- 

 ment names) of Article 67 : Papilio pylades Fabricius, 1793, Ent. syst. 3 (1) : 34. 



The position as regards this name is similar to that of the name Triphysa Zeller, 1850, 

 described in detail in the note on that name. It is sufficient here to note that both these 

 names were names published as replacements for earlier names which were invalid as junior 

 homonyms of names published by Meigen in 1800. In the present case the earlier homonym 

 was Zelima Meigen, 1800 (Nouv. Classif. Mouches deux Ailes : 34). The position of these 

 replacement names would have been completely upset, if when dealing with an application 

 submitted on behalf of dipterists for the suppression under the Plenary Powers of Meigen's 

 Nouv. classif., the Commission had acceded to that request without taking special measures to 

 protect the position of the names in the Order Lepidoptera here under consideration. The 

 decision taken in that case included a provision under which the names which were junior 

 homonyms of Meigen, 1800 names and had long ago been replaced were themselves suppressed 

 under the Plenary Powers for the purpose of the Law of Priority but not for that of the Law of 

 Homonymy, the position of the replacement names involved being thus completely protected. 

 Under this decision, which was embodied in the Commission's Opinion 678 published in 

 October 1963 (Bull. zool. Nom. 20 : 339-342), the name Zelima Fabricius, 1807, was 

 suppressed under the Plenary Powers for the purposes of the Law of Priority but was expressly- 

 kept alive for the purposes of the Law of Homonymy, the position of the replacement name 

 Ailus Billberg, 1820, being thus fully safeguarded. 



AJANTIS Hiibner, 1816, Verz. bekannt. Schmett. (1) : 13. Type-species by selection by Scudder 

 (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 106) : Papilio sapho Drury, [1782], 77/. nat. 

 Hist. 3 : index et 54, pi. 38, fig. 4. 



AKASINULA Toxopeus, 1928, Tijdschr. Ent. 71 : 181, 194. Type-species by original designa- 

 tion : Polyommatus akasa Horsfield, [1828], Descr. Cat. lepid. Ins. Mus. East India Coy 

 (r) : 67, pi. 1, figs 1, iA. 



ALAENA Boisduval, 1847, in Delegorgue, Voy. Afrique austr. 2 : 591. Type-species by mono- 

 typy : Acraea amazoula Boisduval, 1847, in Delegorgue, ibid. 2 : 591. 



That the above species was established by Boisduval as belonging to the genus Acraea Fab- 

 ricius on the same page as that on which it became the type-species of the new genus A laena 

 is due to the fact that, after having described this species in this way, Boisduval added that 

 it should, in his view, be placed in a genus of its own and thereupon established the 

 genus A laena for this purpose. 



ALAZONIA Hiibner, [1819], Verz. bekannt. Schmett. (3) : 46. Type-species by selection by 

 Hemming (1934, Entomologist 67 : 37) : Papilio cydippe Linnaeus, 1767, Syst. Nat. (ed. 12) 

 1 (2) : 776, no. 163. 



When citing the nominal species Papilio cydippe, Hiibner gave as the Linnean reference the 

 number " 163 ", which (as shown above) was the number allotted to this species by Linnaeus 

 in 1767. Although the name Papilio cydippe (as applied to the present species) is commonly 

 cited as having been first published in 1767 in the Twelfth Edition of the Syst. Nat., it was in 

 fact first published four years earlier in 1763 (Amoen. acad. 6 : 409) ; this was clearly indicated 

 by Linnaeus himself in 1767 by citing the earlier Amoen. acad. reference. It is no longer 

 necessary however to take account of the usage of this name in 1763, for by a Ruling given 



