GENERIC NAMES OF BUTTERFLIES 351 



have habitually been treated as having, as their type-species, species other than those which 

 were in fact their type-species. It was for this reason that, when it was decided to ask the 

 Commission to give relief under its Plenary Powers in the case of the name Liptena, it was 

 decided also to ask the Commission to deal with the case of the name Pentila. The subsequent 

 history of the name Liptena has been explained in the note on that name already given. As 

 regards Pentila, the position is set out below. 



As established by Westwood, the genus Pentila had as its type-species by monotypy the 

 nominal species Pentila zymna Westwood, [1851] (in Doubleday, Gen. dium. Lep. (2) : pi. 76, 

 fig. 6). The name Pentila was however never used in this sense, the genus Pentila being always 

 treated as having as its type-species Tingra tropicalis Boisduval. Its true type-species 

 (Pentila zymna) is currently treated as belonging to a quite different genus, Megalopalpus 

 Rober, 1881. On the other hand, at the time of the submission of this case to the Com- 

 mission Tingra tropicalis was the type-species of the virtually forgotten nominal genus 

 Tingra Boisduval, 1847. Thus, at the time in question the strict application of the Code 

 would have led to the most confusing changes : (i) the large group of species known to all as 

 belonging to the genus Pentila would have had to be transferred to the unfamiliar name 

 Tingra ; (ii) the name Pentila would have had to be transferred to the genus Megalopalpus, 

 the latter name disappearing as a junior subjective synonym of Pentila. 



In order to prevent this deplorable situation from arising, the Commission was asked to use 

 its Plenary Powers to suppress the name Tingra Boisduval and to designate the nominal 

 species Tingra tropicalis Boisduval to be the type-species of Pentila Westwood. This request 

 was granted by the Commission, its decision being promulgated in its Opinion 566, published in 

 1959 {Opin. int. Comm. zool. Now. 20 : 377-390). In the same Opinion the name Pentila 

 Westwood with Tingra tropicalis Boisduval as type-species was placed <>n the Official List of 

 Generic Names in Zoology as Name No. 1366. 



PEPLIA Hubner, [1819], Verz. bekannt. Schmett. (2) : 20. Type-species by selection by 

 Scudder (1875, Proc. amer. Acad. Arts Sci , Boston 10 : 244) : Papilio caricae Linnaeus, 

 1758, Syst. Nat. (ed. 10) 1 : 484. 



The name Peplia Hubner is invalid, as it is a junior objective synonym of Nymphidium 

 Fabricius, 1807. 



A small genus centred around Papilio hunts Stoll, 1 780' was established in 1911 on 

 morphological grounds by Stichel who applied to it the name Peplia Hiibner. However, as 

 shown above, that name is a junior objective synonym of Nymphidium Fabricius and cannot 

 be used in the manner adopted by Stichel. The genus so recognized by Stichel, being without 

 a nomenclatorially available name, has since been given the name Pseudopeplia Hemming. 



PEPLIOPHORUS Waterhouse & Lyell, 1914, Butts Australia : 101-102 (an Incorrect Sub- 

 sequent Spelling of Pepliplmrus Hiibner, [1819]). 



PEPLIPHORUS Hubner, [1819], Verz. bekannt. Schmett. (5) : 71. Type-species by selection 

 by Scudder (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 245) : Papilio cyanea Cramer, 

 [ x 775]> Uitl. Kapellen 1 (7) : 120, pi. 76, figs C, 1). 



PEPLODYTA Toxopeus, 1929, Tijdschr. Ent. 72 (3/4) : 230. Type-species by original desig- 

 nation : Papilio cyanea Cramer, [1775], Uitl. Kapellen 1 (7) : 120, pi. 76, figs C, D. 



The name Peplodyta Toxopeus is invalid, as it is a junior objective synonym of Pepliplmrus 

 Hubner, [1819]. 



PERCNODAIMON Butler, 1876, Ent. mon. Mag. 13 : IS2. Type-species by original desig- 

 nation : Percnodaimon pluto (Fereday MS.) Butler, 1876, ibid. 13 : 152. 



It is necessary to take note of the peculiar (and unsatisfactory) way in which the specific 

 name pluto was first published. This specific name was first published in the combination 

 Erebia pluto in a paper by F. W. Fereday published in [1872] (Trans. N.Z. Inst. 4 : 214-218). 

 In this paper which was no more than a popular account of his experiences as a lepidopterist 

 in New Zealand, Fereday inserted the following brief observation : " I may also mention 

 a black butterfly, found on the bare summits of the snowy mountains, and of which I have 



