GENERIC NAMES OF BUTTERFLIES 39 



whatever species might be selected as the type-species of Amblypodia, it could only be one of 

 those included by Horsfield in this third section and further that, as Papilio apidamus had been 

 selected as the type-species by Scudder and was a member of that Section, Scudder's selection 

 of that species as type-species was perfectly valid. Riley recognized that, if this view were 

 to be accepted, it would be necessary to transfer the name A mblypodia to the genus long known 

 as Arhopala Boisduval, 1832 and that, as Arhopala would become a junior subjective synonym 

 of Amblypodia, a new name would be needed for the genus hitherto known as Arhopala ; 

 this was supplied by Riley who then introduced the name Horsfieldia with Thecla narada as 

 type-species. Fortunately, the argument advanced by Riley was invalid, depending upon 

 the same so-called " restriction " principle as that recognized by Scudder in 1875 but never 

 recognized in the International Code, for Horsfield's third section comprised four species 

 and it is not possible for the author of a generic name, while not designating a type-species, 

 to indicate that only some — in this case, four — of the included species shall be eligible for 

 selection as type-species by a later author. 



The position is therefore (a) that Thecla narada Horsfield is the valid type-species of Ambly- 

 podia Horsfield by selection by Boisduval in 1870, and (b) that the name Horsfieldia Riley, 

 1922, of which also the above species is type-species (by original designation) is invalid as a 

 junior objective synonym of Amblypodia Horsfield. The normal species Papilio apidanus 

 Cramer, the pseudotype of A mblypodia adopted by Scudder in 1875 and again by Riley in 1922, 

 belongs to the large group of species habitually treated until recently as belonging to the genus 

 Arhopala Boisduval. Under a revision of the Arhopala-Gionp made by Evans in 1957 

 (Bull. Br. Mus. nat. Hist., (Ent.) 5 : 85-141) the species hitherto placed in Arhopala were 

 re-arranged to form a number of genera, the greater number being placed in Naraihura 

 Moore, [1879] ; one of the existing genera then accepted by Evans as taxonomically required 

 was Flos Doherty, 1889, which had till then been treated as a junior subjective synonym of 

 Arhopala Boisduval (or, according to the view taken as to the type-species of Amblvpodia, as a 

 junior subjective synonym of that generic name). The type-species of Flos Doherty is (by 

 original designation) Papilio apidanus Cramer, the one-time pseudotype of Amblypodia 

 Horsfield 



AMBLYSCIRTES Scudder, 1872, 4/I1 Ann. Rep. Peabody Acad. Sci. 1871 : 75. Type-species 

 by original designation : Hesperia vialis Edwards, 1862, Proc. Acad. >iat. Sci. Philad. 

 1862 : 58. 



AMECERA Butler, 1867, Ann. Mag. nat. Hist. (3) 19 : 162. Type-species by selection by- 

 Butler, February 1868, Ent. mon. Mag. 4 : 195) : Papilio megera Linnaeus, 1767, Syst. Nat. 

 (ed. 12) 1 (2) : 771. 



Butler selected the above species as type-species in 1868. The selection cited above is the 

 earlier, the other (Cat. diurn. Lep. Satyridae Brit. Mus. : 123) not having been published until 

 July of that year. 



The name Amecera Butler is invalid as it is a junior objective synonym of Lasannmata 

 Westwood, 1841, of which the same species is the type-species. (Under the erroneous 

 belief that a nominal species could not be the type-species of more than one genus and that, 

 where such a situation arose, it was permissible to change the type-species of the later- 

 established of the two genera concerned, Moore ([1893, Lep. ind. 2 (13) : 12 nota) sought to 

 change the type-species of this genus to Hipparchia eversmanni (F. de W., ms.) Eversmann, 

 1847 (Bull. Soc. imp. Nat. Moscou 20 (3) : [no text], pi. 2, figs 5, 6). 



AMECHANIA Hewitson, [June 1861], III. exot. Butts 2 : [87]. Type-species by monotypy : 

 Amechania incerta Hewitson [1861, ibid. 2 : [88], pi. [44] 2 figs. 



AMENIS Watson, 1893, Proc. zool. Soc. Lond. 1893 : 11, 12. Type-species by original desig- 

 nation : Pyrrhopyga [sic] pionia Hewitson, [1857], ///. exot. Butts 2 : [120], pi. [60], fig. 9. 



AMETRON Hayward, 1940, An. Soc. cienc. argent. 130 : 85. Type-species by original desig- 

 nation : Ametron subviridis Hayward, 1940, ibid. 130 : 87, fig. 10 (3 figs). 



