72 L. de Niceville — On new and little-known Rhopalocera. [Nos. 2 — 4, 



black line. Underside, both wings exactly as in the male. Cilia white 

 on both sides in both sexes. 



Nearly allied to Cyaniris alcasa, Horsfield, from which {apud Moore 

 in ' Lep. Cey.') the male differs on the upperside of the fore wing having no 

 dusky on the base and costal margin, and the outer black border being 

 narrower throughout. 



Two males were taken by me in the bed of the Simla river on the 

 26th October and 2nd November, 1879, respectively, and one female also 

 at Simla but the exact locality and date were not recorded. All three spe- 

 cimens are quite perfect ; and the males agree absolutely except in size. I 

 also took one male in Sikkim in October at about 3,500 feet elevation. 



Mr. Moore seems to have described the female of some other species 

 as the female of O. albocceruleus, as he states that in that sex the broad 

 outer marginal black band on the upperside of the forewing does not reach 

 the posterior angle, whereas in my female the band is very wide at that 

 point. As the undersides of both sexes ol: the specimens described above 

 agree absolutely, I think I have paired them correctly, while if the females 

 of this species be variable Mr. Moore's description would be correct. 



9. Cyanikis chennellii, n. sp. (Plate I, fig. 10, S .) 



Has. Shillong, Assam. 



Expanse : <3^ , I'l and 1-25 inches. 



Description : Male. Upperside, both wings lavender-blue. Fore- 

 wing with the outer margin widely dusky-black, widest at the apex ; a 

 dusky disco-cellular streak. Sindwmg with the costal and outer margins 

 widely dusky-black. Underside pale grey. Forewing with a slender disco- 

 cellular streak outwardly defined with whitish, a discal slightly sinuous 

 series of six rounded spots also outwardly defined with whitish ; very pale 

 and indistinct submarginal lunular line, marginal linear spots, and anteciliary 

 line. Hindwing with two subbasal small black spots, a faint disco-cellular 

 streak, and an irregular discal series of nine black spots outwardly defined 

 with whitish, oi: which the third, fourth and fifth from the costa are much 

 paler ; marginal markings as on the forewing, Qilia of both wings somewhat 

 dusky on the upperside, concolourous with the wings on the underside. 



There are two male specimens in the Indian Museum, Calcutta, which 

 were taken by Mr. A. W. Chennell, after whom I have named the species ; 

 they differ only in size. 



10. Nacaditba bhutea, n. sp. (Plate I, fig. 13, $ .) 

 Has. Sikkim. 

 Expanse : ^ , 1*1 inches. 



Description. Male. Differs from Sikkim specimens of I^. ardates, 

 Moore, in being larger, the band crossing the middle of the cell on the 



