1880.] 



Lepidoptera from ilie Andaman Islands, Sfc. 



233 



One male and one female, the former differing from a specimen from 

 the Indian continent (Sylhet) only in its rather darker and more distinctly 

 marked underside. The lighter apical portion of the fore-wing in the 

 male has a heautiful bronzy gloss changing to dark purple according to 

 the incidence of the light. Both tlie insular and continental specimen, 

 but especially the former, present slight traces of the blue marginal band so 

 consjjicuous in the hind-wings of Javan and Ceylonese examples, in the 

 shape of a small patch of metallic green scales on the anterior caudal 

 lobe. 



The male of this species, with its velvety black upperside, rich dark 

 brown underside, and elongated hind-wings produced into long robust buff 

 tails, presents a strong contrast to the dull-coloured female with her 

 pure dazzling white underside conspicuously spotted and banded with dark 

 brown, broader wings, and comparatively short and feeble white and black 

 tails. 



Sithon Jcamorta is not the female of 8. surjriva, var. areca, as Felder 

 has suggested, but that of a distinct though closely-allied species peculiar 

 to the Nicobars, whence the Mu.seum has recently received a specimen of 

 the true male differing from S. Icamorta just in the same way as S. sugriva 

 S does from its female, which appears not to have been previously described, 



46, Sithon -westermannii, var. 



Dipsns ivestcrmannii, Felder, Eeise Novara, Lep. p. 241, pi. xxx, figs. 21, 23, J, 

 from Luzon. 



A male and a female, the latter differing from the former in having 

 the upperside smoke-brown instead of purplish fuscous, no discal pale 

 patch in the fore-wing, the hind-wing devoid of blue, and the underside 

 ochraceous-brown instead of dark fawn-colour with a vinous tinge. The 

 male differs from the same sex of 8. westermannii, in having less blue on 

 the upper surface, and the anal spot completely encircled with grey scales. 



A comparison of Andamanese with Pliilippine specimens would, we 

 have no doubt, show that the former is just as much entitled to a name 

 of its own as the latter. Both are merely insular races of the Indian 

 continental ;S'. jangala. 



47. Sithon taupina. 



Myrina tarpim, Hewitson, 111. D. Lep. Lyc. Suppl. 1877, p. 23, pi. (Suppl.) iii a, 

 figs. 93, 94, ? , 



S . IJPPEBSIDE rich deep metallic violet-blue, with the anterior 

 margin of the fore-wing narrowly, and the external margin of both wings 

 more broadly and decreasingly bordered with black. Underside with 

 about the basal two-thirds of both wings coerulescent or virescent opaque 

 dead white, the rich red-brown of the outer margins darker but similarly 



