37° FRANCIS HEMMING 



promulgated in its Opinion 175 published in 1946 (Opin. int. Comm. zool. Nom. 2 : 509- 

 520). In 1954 tms generic name, so denned, was placed by the Commission in its Opinion 

 270 (loc. cit. 6 : 25-40) on the Official List of Generic Names in Zoology as Name No. 689. 

 At the time when the foregoing decision was taken, it was not possible to take a decision 

 on the question of placing the specific name of the type-species on the corresponding 

 Official List, because the name Papilio icarus Rottemburg, 1775, was a homonym of a name 

 Papilio icarus Cramer, [1775] (Uitl. Kapellen 1 (2) : 26, pi. 18, figs A, B), there being at that 

 time no means for determining the relevant precedence to be accorded to these names. This 

 difficulty was overcome by the Commission in its Opinion 516 promulgated in 1958 (loc. cit. 

 19 : 1-44), in which directions were given, inter alia, that Rottemburg's paper published in 

 the serial Der Naturforscher in 1775 should be accorded precedence over the portion of 

 Cramer's Uitl. Kapellen published in the same year. Under this ruling the name Papilio 

 icarus Rottemburg became the senior of the two homonyms concerned and thus the oldest 

 available name for the type-species of the genus Polyommatus Latreille. In the same year 

 this result was recognized by the Commission in its Direction 96 (loc. cit. 19 : (i)-(xiv)), in 

 which the name icarus Rottemburg, 1775, (as published in the binomen Papilio icarus, was 

 placed on the Official List of Specific Names in Zoology as Name No. 1515. 



POLYSTICHTHIS Agassiz, 1846, Nomencl. zool. (4to Ed.), Index univ. : 304 (an Unjustified 

 Emendation of Polystichlis Hiibner, [1819]). 



POLYSTICHTIS Hiibner, [1819], Verz. bekannt. Schmett. (2) : 18. Type-species by selection 

 by Scudder (1872, \th Ann. Rep. Peabody Acad. Sci. 1871 : 49) : Papilio cereus Linnaeus, 

 1767, Syst. Nat. (ed. 12) 1 (2) : Errata [a nominal species established as a replacement for 

 Papilio caeneus Linnaeus, 1767, ibid. 1 (2) : 796]. 



In 1875 (Proc. amer. Acad. Arts Sci., Boston 10 : 254) Scudder quite without justification 

 rejected the type-selection made by himself in 1872 and sought to select in its place the 

 nominal species Polystichtis zeangira Hiibner, [1819] (Verz. bekannt. Schmett. (2) : 18) (a 

 nominal species introduced quite unnecessarily as a replacement for the nominal species 

 Papilio zeanger Stoll, [1790], Aanhangs. Werk Uitl. Kapellen Pieter Cramer : 165, pi. 37, 

 fig. 2). Scudder's mistake in 1875 led some authors (e.g. Stichel, 1930, in Strand's Lep. 

 Cat. 41 : 628, 629) to misuse the name Polystichtis Hiibner, employing it in place of Calospila 

 Geyer, [1832], the latter name being sunk as a junior subjective synonym of Polystichtis. 

 Correctly interpreted in accordance with Scudder's type-selection of 1872, the name Poly- 

 stichtis is a junior subjective synonym of Emesis Fabricius, 1807. 



POLYSTIGMA Godman & Salvin, [1886], Biol, centr.-amer., Lep. Rhop. 1 : 469. Type-species 

 by monotypy : Chrysophanus nais Edwards, 1876, Trans, amer. ent. Soc. 5 : 291. 



The name Poly stigma Godman & Salvin is invalid, as it is a junior homonym of Poly stigma 

 Kraatz, 1880 (Deuts. ent. Z. 24 : 191). 



POLYTHRIX Watson, 1893, Proc. Zool. Soc. Lond. 1893 : 16, 19. Type-species by original 

 designation : Eudamus metallescens Mabille, 1888, Le Naturaliste (2) 2 : 108, fig. 2. 



POLYTREMIS Mabille, 1904, in Wytsman's Gen. Ins. 17 (B) : 136. Type-species by original 

 designation : Gegenes contigua Mabille, 1877, Bull. Soc. zool. Fr. 1877 : 232 nota. 



The taxon represented by the nominal species Gegenes contigua Mabille is currently treated 

 subjectively on taxonomic grounds as being the same as that represented by the older- 

 established nominal species Goniloba lubricans Herrich-Schaeffer, 1869 (CorrespBl. zool.- 

 min. Ver. Regensburg 23 : 195 [repaged offprint as Prodromus 3 : 75]). 



POLYURA Billberg, 1820, Enum. Ins. Mus. Billb. : 79. Type-species by selection by Scudder 

 (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 255) : Papilio pyrrhus Linnaeus, 1758, 

 Syst. Nat. (ed. 10) 1 : 462. 



Both Eriboea Hiibner, [18 19], and also Eulepis Billberg, 1820, were formerly applied to the 

 present genus by various authors through misconceptions as to the type-species of those 

 genera. Particulars have been given in the note on Eriboea. 



