GENERIC NAMES OF BUTTERFLIES 229 



Nymphalis Latreille, a genus which, as recognized by Westwood, contained inter alia, the 

 nominal species Papilio jason Linnaeus, a taxon bearing an invalid name and later renamed 

 Papilio jasius by Linnaeus. This latter nominal species is the type-species of Jasia Swainson. 

 In these circumstances there can be no doubt that the word " Iasius " written by Westwood is 

 an accidental misspelling of the name Jasia and therefore that Iasius Westwood, [1850], should 

 be regarded as an Incorrect Subsequent Spelling of Jasia Swainson, 1832. 



IASPIS Kaye, 1904, Trans, ent. Soc. Lond. 1904 : 196. Type-species by designation by the 

 Commission : Thecla temesa Hewitson, [1869], ///. diurn. Lep., Lycaenidae ; 1 (text) : 

 130 ; 2 (plates) : pi. 52, figs 284, 285. 



There was a serious defect in the way in which this name appeared in Kaye's paper, for the 

 correction of which it has been necessary to submit an application to the Commission. 



The name Iaspis was introduced by Kaye in a catalogue of the butterflies of Trinidad, 

 where it appeared in the portion relating to the family Lycaenidae. Kaye designated as the 

 type-species of this genus the nominal species Symmachia (?) temesa Hewitson, 1870. It is 

 here that the difficulty arises, for the above species is not a Lycaenid but a Riodinid, and does 

 not agree in any way with Kaye's description of his genus Iaspis. The explanation of this 

 extraordinary event was provided by Druce in 1906 {Ann. Mag. nat. Hist. (7) 17 : 334-335) 

 in a " Note on the genus Iaspis Kaye ". After drawing attention to Kaye's mistake, Druce 

 went on to observe that at almost exactly the same time Hewitson had established a nominal 

 species in two different genera, to each of which he gave the specific name temesa. One of these 

 was the Riodinid Symmachia (?) temesa Hewitson, 1870 (Descr. New Spec. Equat. Lep. : 52), a 

 taxon which was redescribed and figured by Hewitson in the following year (1871) (///. 

 exot. Butts 4 : [85], pi. [46], figs 17, 18); the other species was the Lycaenid Thecla temesa 

 Hewitson, [1869] (for which the reference has been given at the head of the present note). 

 Druce concluded — no doubt, correctly — that it was the Lycaenid species and not the Riodinid 

 which Kaye had intended to designate — and which he believed he had designated — as 

 the type-species of the genus Iapsis. 



Subsequent authors have interpreted Iaspis in accordance with the undoubted intention of 

 Kaye, that is, as a Lycaenid, but, as matters stand, this is undoubtedly incorrect, for Kaye 

 unequivocally designated the Riodinid Symmachia temesia Hewitson as type-species. It is to 

 regularize the situation described that the Commission has been asked to use its Plenary 

 Powers to designate as the type species of the genus Iaspis Kaye the Lycaenid nominal 

 species Thecla temesa Hewitson, [1869], thus giving valid force both to Kaye's original inten- 

 tion and also the practice of later authors. 



ICARICIA Nabokov, 1944, Psyche 51 : 104. Type-species by original designation : Lycaena 

 icarioides Boisduval, 1852, Ann. Soc. ent. Fr. (2) 10 : 297. 



ICARUS Rober, 1898, Ent. Nachr. 24 : 186. Type-species by monotypy : Papilio zahnoxis 

 Hewitson, [1864], III. exot. Butts 3 : [2], pi. [1], fig. 18. 



This name is invalid, as it is a junior homonym of Icarus Forbes, 1844 {Rep. Brit. Ass. 13 

 (Cork, 1843) : 187). It has been replaced by the name Iterus Donitz, 1899. 



ICHNUSA Reuss, 1939, Ent. Z. 53 : 3. Type-species by monotypy : Papilio (Vanessa) 



ichnusa Bonelli, 1826, Mem. R. Ace. Sci. Torino 30 : 174, 186, pi. 2, fig. 2 ?. 



The taxon specified above was described and named twice at very nearly the same time, 

 once by Bonelli, and once by Hiibner. Contrary to Reuss's belief, it was Hiibner who was 

 the first to publish this specific name. The full reference is as follows : Papilio ichnusa 

 Hiibner, [1823-1824] [Samml. europ. Schmelt. : pi. Pap. 170, fig. 840. This figure is correctly 

 numbered " 840 " on the plate but at the foot of the plate bears the incorrect number " 842 ". 



I DAE A Oberthur, 1880, Ann. Mus. Stor. nat. Genova 15 : 485 (an Incorrect Subsequent 

 Spelling of Idea Fabricius, 1807). 



IDAEOPSIS Oberthur, 1880, Ann. Mus. Stor. nat. Genova 15 : 486 (an Incorrect Subsequent 

 Spelling of Ideopsis Horsfield 1857). 



