SOME UNDESCRIBED RHOPALOCERA FROM SIAM. 187 



in the male of sphinx. This alone separates the males at once 

 without looking any further. Unfortunately we have not yet seen 

 the female. 



21. Biduanda cyara (Hewitson). 



Myrlna cyara, Hewitson, hi, Diurnal Lep. Suppl. p. 26, pi. 3b, 

 figs. 109, 110 (1878). 



Hewitson, (I.e., p.6,) describes both sexes of his M yrina, melisa, 

 and later (p. 26) a specimen, sex not mentioned, of his cyara. Of 

 these he figures only the " female " of melisa and the specimen of 

 cyara. An examination of his Types, in the British Museum, proves his 

 male of melisa to be in fact a male, his female of melisa a male, and 

 his Type of cyara a female. 



The errors he committed have unfortunately been followed 

 by most writers ever since, owing probably to the great rarity of 

 the species. 



From the above it is evident that Hewitson' s " female " of 

 melisa, being a male, cannot belong to that species. - We consider it 

 in fact to be the male of cyara, the undersides agree so very closely. 

 In addition to Hewitson's Types there are in the British Museum : 

 one male from Bhutan taken by G. C. Dudgeon and a female from 

 the Me Song forest, N. Siam. This latter was at first thought 

 to be the female of melisa, of which two males were obtained in 

 S. E. Siam, but it agrees so very closely with Hewitson's Type of 

 cyara that it seems more probable that it belongs to that species, 

 especially as the two localities, that of melisa and that of cyara, are 

 some 500 miles apart and separated by the central plain of Siam. 

 The true female of melisa, therefore, still remains to be discovered, 

 and the distribution of the two species is : cyara, N. E. India to N. 

 Siam ; melisa, Lower Burma to S. E. Siam. 



HESPERIID^. 



HESPERIIN.E. 



22. Orthophaetus barroni, sp. no v. 



(Plate VI, figs. 10 and 11.) 



Capita zennara, Godfrey (nee Moore), Jouin. Nat. Hist. Soc. Siam, 

 ii, p. 141 (1916). 



<5. Upper side, both wings. — Uniformly dark brown, the veins 



VOL. IV, NO, 3, 1921. 



