GENERIC NAMES OF BUTTERFLIES 311 



NEPHERONIA Butler, 1870, Cistula ent. 1 : 38, 53. Type-species by original designation : 

 Pieris idotea Boisduval, [1836], (Roret's Suite a Buffon), Hist. nat. Ins., Spec. gen. Lepid. 

 1 : 441. 



The taxon represented by the nominal species Pieris idotea Boisduval is currently treated 

 subjectively on taxonomic grounds as being a $-iorm of the taxon represented by the older- 

 established nominal species Papilio argia Fabricius, 1775, Syst. Ent. : 470. 



NEPTIDOMIMA Holland, 1920, Bull. amer. Mus. nat. Hist. 43 : 116, 164. Type-species by 

 original designation : Neptis exaleuca Karsch, 1894, Berl. ent. Z. 39 : 9, fig. 5. 



NEPTIDOPSIS Auri\ illius, 1898, K. svenska YelenskAkad. Handl., Stockholm 41 (No. 5) : 

 T 53. !55 Type-species by selection by Munroe (1949, J.N.Y. ent. Soc. 57 : 72) : Papilio 

 ophione Cramer, [1777], Intl. Kapellen 2 (10) : 27, pi. 114, figs E, F. 



NEPTIS [Illiger], 1807, All-cm. Lit. Ztg, Halle [Jena] 1807 (No. 2) :'n8o. Type-species by 

 monotypy: Nereis eunice Hiibner, [1809], Satnntl. exot. Schmett. 1: pi. [9]. 



This is one of the cases — of which the first in alphabetical order is Apatura [Illiger] — in 

 which, in an anonymous review, Illiger published a number of names which shortly afterwards 

 (in the same year) were published by Fabricius in an entirely different sense and which in that 

 sense were destined to become some of the best-known generic names in the butterflies. 

 These Illigerian names would have caused the most serious confusion and disturbance in the 

 literature if they had been brought into use as required under the Law of Priority. Immedi- 

 ately upon the unwelcome discovery of Illiger's paper an application was prepared for sub- 

 mission to the Commission, asking for suppression of these names under the Plenary Powers. 

 Administrative and financial difficulties combined to delay both the submission of this 

 case to the Commission and also the promulgation of the Commission's decision, when taken. 

 Ultimately, that decision was embodied in the Commission's Opinion 232 and was published 

 in 1054 (Opin. int. Comm. zool. Nom. 4 : 249-274). By the Ruling given in that Opinion the 

 Commission granted the relief asked for, in the present case using its Plenary Powers to 

 suppress the name Neptis [Illiger], 1807, for the purposes both of the Law of Priority and 

 of the Law of Homonymy, thus validating the well-known name Neptis Fabricius, 1807. 

 By the same Opinion the name Xeptis [Illiger] was placed on the Official Index of Rejected 

 and Invalid Generic Names in Zoology as Name No. 44. 



NEPTIS Fabricius, 1807, Mag. f. Insektenk. (Illiger) 6 : 282. Type-species by selection by- 

 Crotch (1872, Cistula ent. 1 : 66) : Papilio aceris Esper, [1783], Die Schmett. 1 (Bd 2) Forts. 

 Tagschmett. : 142, pi. 81, figs 3 $, 4 $. 



When, as explained in the immediately preceding note the Commission used its Plenary 

 Powers to suppress the name Neptis [Illiger], 1807, for the purpose of validating the slightly 

 junior name Neptis Fabricius, it completed that action by placing the name Neptis Fabricius 

 on the Official List of Generic Names in Zoology as Name No. 662. 



The taxon represented by the nominal species Papilio aceris Esper is currently treated 

 subjectively on taxonomic grounds as a subspecies of that represented by the older-established 

 nominal species Papilio hylas Linnaeus, 1758 (Syst. Nat. (ed. 10) 1 : 486). 



NEPTIS Hiibner, [18 19], Verz. bekannt. Schmett. (3) : 42. Type-species by selection by Hem- 

 ming (1943, Proc. R. ent. Soc. Lond. (B) 12 : 28) : Papilio emilia Cramer, [1779], Uitl. Kapellen 

 3 (19) : 50, pi. 223, figs E, F. 



This is another of the strange cases where Hiibner appropriated a name published by one of 

 his predecessors and republished it as his own in an entirely different sense. It is, of course, 

 invalid as a junior homonym of Neptis Fabricius, 1807. 



NEREIS Hiibner, [1806], Tentamen : [1]. Type-species by monotypy : Papilio polymnia 

 Linnaeus, 1758, Syst. (ed. 10) 1 : 466. 



The name Nereis Hiibner, as published in the Tentamen in 1806 is invalid for two reasons, 

 namely : (1) The leaflet Tentamen in which this name was published was rejected by the 

 Commission for nomenclatorial purposes by the Commission by the Ruling given in Opinion 



