ON NEW AND LITTLE-KNOWN BUTTERFLIES. 317 



of the wing. Cilia pure white. Face with two white streaks ; 

 palpi very long and porrect, above fuscous, beneath white, except 

 the tips which are fuscous ; thorax and abdomen above dull hair- 

 brown ; abdomen beneath dull orange. 



Allied to N. amrita, Felder, female specimens of which I possess from 

 Perak, Singapore, and N.-E. Sumatra, but differs from the same sex of 

 that species in being smaller, the tails (especially the inner one) much 

 shorter, the white area on the upperside of the hindwing larger, and the 

 costal orange area on the underside of the hindwing much smaller. 

 Nearer to N. clcella, Weymer,* with which it agrees in size, extent 

 of white area on the upperside of the hindwing, and in the length 

 of the tails, but differs entirely in the ground-colour of the underside, 

 N. clcella having it dull ochreous instead of dull orange ; the black 

 anteciliary thread in the hindwing is also twice as prominent in 

 N. clcella as it is in iV. nisibis. It may also be near to li Sithon " 

 pallida, Druce, from Borneo,f of which the male only is known ; but 

 that species is said to have " a blue line " above the outer black spots 

 on the underside of the hindwing, which is absent in the present 

 species. It is near to a Sithon " paluana, Staudinger,| but appears 

 to differ on the underside of the hindwing in having the outer discal 

 macular straight black band considerably further removed from the series 

 of black spots beyond. The tails appear to agree in length. ' { Sithon " 

 teunga^ Grose Smith, § probably belongs to some other genus than 

 Neocheritra. It is described from a male, and the secondary 

 sexual characters appear to differ from those of Neocheritra. On 

 the underside it is said to be " dull pale brown," while N. nisibis is 

 orange, besides other differences. Lastly, it differs from N. namoa, 

 de Niceville,H in the tails being much shorter, and the ground-colour 

 of the underside orange instead of " pale bluish-white." I do not 

 think it is very closely allied to Thrix gama, Distant, described 

 from Penang, and males in my collection from the Battak Mountains of 



* Hypolycazna clcella, Weymer, Stet. ent. Zeit., vol. xlvni, p. 10, n. 8, pi. ii, fig. 5, female 

 (1887), from Nias Island. 



f Proc. Zool. Soc. Lond., 1873, p. 352, n. 14, pi. xxxiii, fig. 3, male. 



% Iris, vol. ii, p. 107, pi. i, fig. 9, female (1889), from Palawan in the Philippine Isles. 



§ Ann. and Mag. of Nat. Hist., sixth series, vol. iii, p. 317 (1889), from Kina Balu 

 Mountain, North Borneo. 



|| Journ.A. S. B.,vol. bdii,pt. 2, p. 41, n. 36, pi. v, fig. 9, male (1894), from the Battak 

 Mountains, N.-E. Sumatra. 



