RHOPALOCEllA MALAYANA. 253 



Genus SITHON. 



Sithm, Hiibner, Vcrz. bek. Schmett. p. 77 (1816); Moore, Proc. Zool. Hoc. 1883, p. 52G. 



Anterior wings subtriangular, the costal margin arched at l)aso, the apex sul)a,cute, the outer margni 

 very slightly convex, posterior margin slightly convex and provided (in male) with a tuft of hairs near 

 base. Costal nerviire sinuate, terminating on costa near end of cell, first subcostal nervulc impinging on 

 the costal nervure and emitted at about one-third before the end of cell, second emitted about midway 

 between bases of first and third, the last near end of cell, first and second median nervules with an 

 apparently common origin near end of cell. Posterior wings subovate, costal margin at about one-third 

 from base suddenly deflected and oblique to apex, posterior margin oblique, somewhat widened and lobular 

 at apex of second median nervule, with a slender tail-like appendage at apex of lower median nervule, 

 and a shorter and more lobate one at apex of submedian nervure, abdominal margin oblique, rounded and 

 not cleft at anal angle, subcostal nervules bifurcating at about one-third before end of cell. Palpi porrect, 

 second joint extending about half its length beyond the head, third slender, about or a little less than half 

 the length of second. Body long and moderately robust. Antennae moderately long, with a slender but 

 well-formed apical club. 



As known at present, this genus seems to be distributed in an area comprising Bengal, 

 the Malay Peninsula, Java and Sumatra. 



1. Sithon nedymond, var. (Tab. XXII., fig. 1 <? . 



Papilio Xetli/mimd, Cramer, Pap. Ex. iv. t. 299, E, F (1782i. 



Theda Nedi/movd, Horsf. Cat. Lep. E. I. C. p. 96, u. 28 (1829). 



Sithon Nedi/momI, Hiibn. Verz. bek. Schmett. p. 77 (1816); Moore, Proc. Zool. Soc. 188.3, p. 526. 



Male. Wings above dark fuscous or black ; anterior wings with a large discal dark bluish patch, not 

 extending to base nor above the subcostal nervui'e, and outwardly reaching to about one-third between 

 end of cell and margin ; posterior wings with the outer margin very broadly of the same hue ; tail-like 

 appendages dark fuscous, the outermost with its apical third whitish, the innermost with a longitudinal 

 pale bluish streak. Wings beneath pearly-grey, the outer third of both wings chocolate-brown, of which 

 the innermost portion consists of a broad and somewhat straight darker brown fascia, the posterior wings 

 with a marginal greyish line ; at anal angle of posterior wings the brown is replaced by ochraceous and 

 contains four bluish streaks margined with black, situate one between the second and third median 

 nervules, two between the third median nervule and submedian nervure, and the fourth oblique, between the 

 submedian and internal nervures : above these and between the third median nervule and internal nervure 

 is a transverse black streak inwardly containing some ochraceous markings : between the first and second 

 median nervules is an obscure dark spot containing a few pale bluish scales and outwardly margined with 

 ochraceous. Body above and beneath more or less concolorous with wings ; legs pearly-grey, streaked 

 and annulated with dark fuscous ; palpi pearly-grey, with their apices dark fuscous. 



Exp. wings, 34 millim. 



Hab. — Malay Peninsula: Suugei Ujong (coll. Godfery).— Sumatra (Brit. Mus.). — Java (Horsf.). 



I have only seen one specimen of this species from the Malay Peninsula, which Mr. Godfery 

 writes me that he caught " in a forest-path near the banks of the Linggi in Sungei Ujong." 

 It is evidently an extremely rare species. I have no knowledge of the female,* and have 



■■'■ If it is not to be found in the following species ? 

 February 20, 1885. 3 t 



