GENERIC NAMES OF BUTTERFLIES 235 



Herrich-Schaeffer had never published the name Paraplesia ; he had however published a 

 generic name Paraplesis in 1856 [Samml. aussereurop. Schmett., Het. : 15, 17) for a genus of 

 moths, and it was no doubt through a misreading of this name that the Felders had formed the 

 erroneous conclusion that the name Paraplesia which they had published for the present genus 

 of butterflies had been anticipated by Herrich-Schaeffer in this way. It will be seen from the 

 foregoing explanation that the name Paraplesia Felder & Felder is not invalid under the Law 

 of Homonymy but is an available name. It follows that the replacement name Isodema is 

 invalid as a junior objective synonym of Paraplesia. 



ISOTEINON Felder (C.) & Felder (R.), 1862, Wien. ent. Monats. 6 : 30. Type-species by 

 monotypy : Isoteinon lamprospilus Felder (C.) & Felder (R.), 1862, ibid. 6 : 30. 



ISSORIA Hiibner, [1819], Verz. bekannt. Schmett. (2) : 31. Type-species by selection by 

 Scudder (1875, Proc. amer. Acad. Arts Set., Boston 10 : 198) : Papilio lathonia Linnaeus, 

 1758, Syst. Nat. (ed. 10) 1 : 481. 



As characterized by the foregoing type-species, the genus Issoria Hiibner belongs to the 

 Argynnis-Grou\i of the family Nymphalidae and is now generally accepted as a taxonomically 

 good genus of that group. Formerly, however, the name Issoria was used in an entirely 

 different sense through the misjudged (and incorrect) action of Moore in 1900 (Lep. ind. 4 

 (46) : 202) in ignoring Scudder's selection of Papilio lathonia as type-species and in setting up 

 in its place the pseudotype Papilio egista Cramer, 1780 (Uill. Kapellen 3 [24] : 158, pi. 281 

 figs C, D). That species, which belongs to a very distinct group in the family Nymphalidae, 

 was without a valid generic name of its own until in 1934 I established the genus Vagrans 

 Hemming for its reception. 



ITABALLIA Kaye, 1904, Trans, ent. Soc. Loud. 1904 : 204. Type-species by original desig- 

 nation : Pieris pandosia Hewitson, [1853], ///. exot. Butts 1 : [8], pi. [4], fig. 14. 



ITANUS Doubleday, [1848], Gen.diurn. Lep. (2): pi. 41, fig. 4. Type-species by monotypy : 

 Itanus phemius Doubleday, [1848], ibid. (2) : pi. 41, fig. 4. 



In the text relating to the above species which was written by Westwood and published in 

 October 1850 {ibid. (2) : 291) the name Itanus Doubleday was set aside, Itanus phemius, the 

 type-species, being placed in the genus Adolias Boisduval. 



ITANUS Felder (C), 1861, Nova Acta Leop. Carol. 28 (No. 3) : 34. Type-species by selection 

 by Scudder (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 198) : Adolias anosia Moore, in 

 Horsfield & Moore, Cat. lep. Ins. Mus. East India Coy (1) : 187. 



The name Itanus Felder is invalid, as it is a junior homonym of Itanus Doubleday, [1848]. 

 The nominal species Adolias anosia Moore was later made the type-species of a new genus 

 Tasinga Moore, [1897]. 



ITERUS Donitz, 1899, Berl. ent. Z. 44, SitzBer. : (22). Type-species through Section (i) 

 (replacement names) of Article 67 : Papilio zalmoxis Hewitson, [1864], III. exot. Butts 3 : 



[2], pi. [1], fig. 18. 



The name Items was introduced by Donitz as a replacement for the name Icarus Rober, 

 1898, which is invalid under the Law of Homonymy. 



ITHOBALLUS Hiibner, [1819], Verz. bekannt. Schmett. (6) : 88. Type-species by selection by 

 Scudder (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 198) : Papilio polydamas Linnaeus, 

 1758, Syst. Nat. (ed. 10) 1 : 460. 



The name Ithoballus Hiibner is invalid, as it is a junior objective synonym of Battus Scopoli 



1777. 



ITHOMEIS Bates, [Sept.] 1862, Trans, linn. Soc. Lond. 23 (3) : 541 nota. Type-species by 

 selection by Scudder (1875, Proc. amer. Acad. Arts Sci., Boston 10 : 198) : Ithomeis auranti- 

 aca Bates, 1862, ibid. 23 (3) : 541 nota. 



The exact date of publication in 1862 of the name Ithomeis Bates is of importance because 

 there is a name Ithomiopsis Felder (C.) & Felder (R.) which was also published in 1862 and 

 which is currently treated as a subjective synonym of Ithomeis Bates. Fortunately, informa- 



