104 Prof. J. 0. Westwood on 



Felder (Sp. Lep., pp. 39, 88) has placed P. DuponclieUi 

 in the genus Euryades, adding, as a second species, the 

 Papilio Corethriis, of Lacordaire and Boisduval (Sp. Gen, 

 Lepid. I. p. 314, pi. 17, Ic, fig. 2; Lucas, in Chenu's En- 

 cycl. d'Hist. Nat. Lep. t. 9. f. 1), and remarking on its 

 close relationship to tbe genus Eurycus. 



Now, the females of P. Corethrus, as stated by the late 

 Edward Doubleday (Gen. D. L. p. 21), from information 

 which I communicated to him, have a large horny pouch 

 on the underside of the extremity of the body, as in the 

 genera Eurycus and Parnassius, but of this structure no 

 mention is made by M. Lucas in his description of the 

 supposed female P. DuponclieUi. The wings in P. Core- 

 thrus are, also, not so densely clothed with scales as in the 

 ordinary species of Papilio; they are quite alike in 

 colour and marking in both sexes, the male external 

 organs resembling those of Eurycus. 



The remarkable diversity in the sexes of Eurycus, the 

 male being black and white, with a row of blood-red 

 spots on the hind-wings, whilst the female is semi-trans- 

 parent, dull buff varied with brown, suggests to my mind 

 the possibility that the black, yellow, and red butterfly, 

 figured by M. Lucas under the name of P. Dvponchelii, 

 may be a male, the true female of which will probably 

 prove to be a pale coloured, semi-transparent butterfly, 

 analogous to that of Eurycus ; in which case, it seems to 

 me to be not improbable, that P. Beevii may prove to 

 be its female. In the meantime, until I have an op- 

 portunity of examining the structure of P. Duponchelii, 

 it will be desirable to consider P. Beevii as a distinct 

 species.* 



Papilio Thersander. 

 Under this name, a species of swallow-tailed butterflies 

 •was described by Fabricius, in his ' Ent. Syst.,^ vol. 3, pt. 

 1, p. 32, with the reference to Jones, fig. pict. vol, i. tab. 

 71, and to the collection of Drurj^, as a native of Sierra 

 Leone, This insect is now regarded as the female of the 

 well-known P. Doreus, Fabr, Syst. Ent. p. 457, and Ent. 

 Syst. vol. 3, pt, i, p, 68 {Phoreas, Cram, pi, 2, figs. B, C) . 



* Since the above observations were written, it has been announced 

 that M. Guenee has communicated a memoir on P. Duponchelii to the 

 Academy of Lyons, to the pubhcation of which we look forward with 

 great interest. 



