GENERIC NAMES OF BUTTERFLIES 301 



MYCALESIS Hiibner, 1818, Zutr. z. Samml. exot. Schmett. 1 : 17. Type-species by selection 

 by Hemming (1937, Proc. R. ent. Soc. Lond. (B) 6 : 149) : Papilio francisca Stoll, [1780], in 

 Cramer, Uitl. Kapellen 4 (28) : 75, pi. 326, figs E, F. 



Up till 1937 ^ was erroneously believed that the name Mycalesis had first been published by 

 Hiibner in the Verz. bekannt. (sign. 4 : 55] and that its type-species was Papilio evadne Cramer, 

 [1779], by selection by Butler (1868, Ent. mon. Mag. 4 : 196). On this basis the name Myca- 

 lesis ranked from 1819. In 1937 however it was realized that this name, as published in 

 volume 1 of the Zutr age, which appeared in 1818, had one year's priority over its publication 

 in the Verzeichniss. Papilio evadne Cramer was not included in this genus in the Zutrdge 

 and could therefore no longer be accepted as the type-species of Mycalesis. Two nominal 

 species only were cited in the Zutrdge as belonging to this genus and from these (as shown 

 above) I selected Papilio francisca Stoll as type-species. This selection served to leave the 

 current usage of this name undisturbed. 



MYCTERIS Mabille, 1877, Petites Nouvelles ent. 2 (167) : 114. Type-species by monotypy : 

 Mycteris caerula [sic] Mabille, 1877, ibid. 2 (167) : 114. 



The taxon represented by the nominal species Mycteris caerula Mabille is currently treated 

 subjectively on taxonomic grounds as representing a subspecies of the taxon represented by 

 the older-established nominal species Pellicia crispus Herrich-Schaeffer, 1870 (CorrespBl. 

 zool.-min. Ver. Regensburg 24 : 160). 



The name Mycteris Mabille is invalid, as it is a junior homonym of Mycteris Agassiz, 1848 

 (Nomencl. zool., Index univ. : 696). It has been replaced by the name Mictris Evans, 1955. 



MYDOSAMA Moore, 1880, Trans, ent. Soc. Lond. 1880 (4) : 170. Type-species through 

 Section (i) (replacement names) of Article 67 : Dasyomma fuscum Felder (C.) & Felder 

 (R.), i860, Wien. ent. Monats. 4 : 401. 



The name Mydosama Moore was introduced as a replacement for the name Dasyomma 

 Felder (C.) & Felder (R.), i860, which is invalid under the Law of Homonymy. 



MYGONA Westwood, [1851], in Doubleday, Gen. diurn. Lep. (2) : 357. Type-species by 

 selection by Hemming (1939, Proc. R. ent. Soc. Lond. (B) 8 : 133) : Pronophila thelebe Double- 

 day, [1849, Gen. diurn. Lep. (2) : pi. 60, fig. 3 ; text published in 1851 by Westwood in his 

 continuation of the above work (2) : 358]. 



This name was published by Westwood as " Mygona Boisduval MS." in the synonymy of 

 the name Pronophila Doubleday, [1849]. At a time when there was no provision in the Code 

 regarding the status of names published in synonymies I selected Pronophila thelebe Double- 

 day to be the type-species of this genus, thus preventing any chance of the name Mygona 

 Westwood being brought into use and possibly displacing some established name of later date, 

 for the species so selected is the type-species of Pronophila Doubleday, of which name Mygona 

 Westwood became by this type-selection a junior objective synonym. 



Since the above action was taken, the position of names published in synonymies has been 

 clarified by the International Congress whose decision has been embodied in Article 11(d) of 

 the present revised Code. Under this a name published in a synonymy does not thereby 

 acquire the status of availability. Under this provision the name Mygona (Boisduval MS) 

 Westwood is not only invalid but in addition does not invalidate under the Law of Homonymy 

 any later use of this generic name. 



MYGONA Thieme, 1907, Berl. ent. Z. 51 (2) : 162. Type-species by original designation : 

 Pronophila prochyta Hewitson, 1862, Trans, ent. Soc. Lond. (3) 1 : 13, pi. 16, fig. 39. 



Thieme expressly treated this as a new name of his own. This name is available nomen- 

 clatorially, not being invalidated by the earlier name Mygona (Boisduval MS.) Westwood 

 which (as explained above), being a name published in a synonymy, possesses no status in 

 nomenclature. 



MYLON Godman & Salvin, [1894], Biol, centr.-amer., Lep. Rhop. 2 : 384. Type-species by 

 original designation : Leucochitonea lassia Hewitson, 1868, Descr. One Hundred new Spec. 

 Hesp. (2) : 49. 



