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XIII. Descriptions of New Butterflies, with Drawings, 

 also Remarks on the Sexes of some Papilios. By 

 W. C. Hewitson, Esq. 



[Read December 2nd, 1850.] 

 Many of the true Papilios, which now bear separate names, will, 

 I believe, if better known, prove to be only sexually and not spe- 

 cifically distinct. 



In the great group of South American Papilios, known by their 

 colouring of black, red and white, several females hitherto de- 

 scribed as species have been mated with their proper males by 

 Messrs. Bates and Wallace. 



Pap. Tullus proves to be the female of P. Sesostris ; and P. 

 Hippason and Vertumnus are accompanied by similar females, 

 all of which will be better explained on the return of those gentle- 

 men to England. 



Pap. Proteus and Areas, both from Venezuela, are male and 

 female, and I have not the least doubt myself that the four butter- 

 flies which have up to the present time been considered as distinct, 

 P. Licophron, P. Thersites, P. Pirithous and P. Acamas, are only 

 the opposite sexes of two species, and will stand thus: 



Papilio Lycophron, Boisd. Spe. Gen. n. 194. 

 $ P. Perithous, Boisd. Sp. Gen. n. 201. 



Papilio Thersites, Fab. Boisd. Sp. Gen. n. 195. 

 $ P. Acamas, Fab. Boisd. Sp. Gen. n. 203. 



P. Licophron and Pirithous are both Brazilian. 



P. Thersites and Acamas are from Jamaica. 



Doubleday's P. Pallas, which differs but slightly from Licophron 

 in the breadth of yellow and position of the lunules of the pos- 

 terior wing, will no doubt find its female in Boisduval'sP. CEbalus, 

 which I have not seen, but which, he says, only differs from P. 

 Pirithous in the same particulars. P. Mentor will most likely 

 have also a dark female. 



These butterflies, much as the sexes are unlike each other in 

 colour, are not more so than the male and female of Polycaon. 



Fam. PAPILIONID.E. 



Genus Papilio. 

 Papilio Bolivar. (PI. X. fig. 2.) 



Upper side of a deep uniform black. Anterior wing with an 

 irregular patch of bright silvery green, extending from the inner 



VOL. I. N. S. PART IV. — MARCH, 1851. H 



