ORDER _LEPADOPTERA. 
Famity—PAPILIONIDA. 
Grenus—PAPILIO. Sus-Genus—EURYADES., Felder. 
EURYADES DUPONCHELII 2. 
(Papilio (Ewryades) Reevii, Westw. in Trans. Ent. Soc. Lond. 1872, p. 103.) 
Puate XXXIV, Fies. 1, 2. 
Alis supra obscure fulvis, subtus pallidioribus, et magis stramineis; anticis macula subapicali flavescenti ; 
margine nigro, incisuris rubrarum marginalibus flavidis; posticis dimidio externo supra fusco, subtus nigro; 
serie duplici macularum, alteraque macularum majorum, supra lutearum, subtus straminearum, interposita ; 
margine sinuato et 1-caudato, incisuris albis. 
Expans. alar. antic. une. 33. 
Habitat ; Buenos Ayres (J. W. Reeve), Coll. Druce. 
Deceived by the assertions of M. Lucas (Annales Soc. Ent. France, tom. viii. p. 91, pl. VIII, 1839, 
and ib. 4th Ser. vol. viii, 1868, p. 5), that the black butterfly with red and yellow spots, figured by him under 
the name of P. Duponchelii, was a female, and that a smaller and still darker coloured individual was the male, 
I was led to describe the female insect, here figured by me, as a distinct species in the Trans. Ent. Soe. 
London, as above referred to, with the suggestion that it might however ultimately be discovered that 
M. Lucas had mistaken the sex of his first specimen, and that it might be in reality the male of the 
insect now before us. I was led chiefly to this opinion by the analogy between the two insects and the two 
sexes of the Australian Hurycus Cressida, the males of which are black, with red and white markings, and the 
females semitransparent and more or less brown, with darker brown marks. Moreover the female of Huryades 
Corethrus (a species closely allied to the female insect here figured) possesses anal lobes similar to those of Par- 
nassius and Eurycus, as stated by Mr. E. Doubleday from information which I had communicated to him (Gen. 
Diurn. Lep. i. p. 21); and in certain females of the species here figured these anal lobes are greatly developed, 
and nearly as long as the whole abdomen: whereas in Mr. Druce’s specimen of the female here figured these 
lobes are either not yet fully developed, or have been broken off near the base. The correctness of my suppo- 
sition as to the mistakes of M. Lucas, and the sexual relationship between this female insect and the male 
P. Duponchelii of Lucas, has been fully determined by Dr. Burmeister (who, from his residence in Buenos Ayres, 
the locality of both Cz. Corethrus and Duponchelii, has had full opportunities of settling the question) in the 
Stettiner Entomolog. Zeit. 31 Jahrg. (1870), p. 414, as well as by M. A. Guénée in his ‘ Notice sur divers 
Lépidoptéres du Musée de Genéve,’ where the females of both these species are figured. 
