CYANIRIS. 319 
It occurs sparingly throughout the Himalayas up to an elevation of 8000 
feet, from March to May, and from August to December. 
Distribution. Japan, Western China, and N. India. 
Cyaniris dilectus. (Plate XXXI. fig. 10, 6 .) 
Polyommatus dilectus, ^iloorc, Proc. Zool. Soc. Lond. 1879, p. 139. 
Cyaniris dilectus, de Nic^ville, Journ. Asiat. Soc. Beng. iii. pt. i. p. G8, p). i. fig. 5, 6 
(1883) ; Butt. Ind. iii. p. 107 (1890). 
" Male. Upperside : both wings pale blue, with a very fine black anteciliary line, which towards 
the apex of the fore wing in some specimens becomes slightly diffused inwardly. Fore wing 
with a patch of irrorated white scales on the disc below the cell and between the median 
nervules, very prominent in some specimens, obsolete in others (as in the Sikkim specimen 
figured). Hind wing with a similar patch, but placed between the second median nervule 
and the costal nervure, and almost reaching the apex. Underside : both wings as in C. albo- 
cceruleus, Moore, but with a more or less prominent submargiual series of dusky lunules. 
" Female. Upperside : fore wing almost as in C. albo&xruletis, but the outer margin less broadly 
black, the basal area glossed with very bright metallic blue, not unmetallic pale lavender- 
blue as in the latter species, the discoceUular streak more prominent. Hind wing with the 
submarginal series of round dusky prominent spots inwardly defined by bluish lunules. 
Underside : both wings as in the male. 
"Expanse, g 1-00 to 1-40, $ -So to 1-35 inch." (ile McevUle, I.e., J. A. S. B.) 
Mr. de Niceville iu his ' Butterflies of ludia,' says : — " In Sikkim this 
species is slightly dimorphic. The rains form has barely a trace, sometimes 
none Avhatever, of the discal white patch, which in the dry-season form is 
veiy prominent on the upperside of the fore Aving. The markings of the 
underside of both wings are also more prominent in the rains form." 
I have received specimens from Wa-ssu-kow and Omei-shan, in Western 
China, and from Kiukiang in Central China, all of which agree very Avell 
with specimens from Sikkim. 
In India, C. dilectus occurs throughout the Himalayas from Simla to Sikkim, 
and also in Upper Burma and Upper Assam, and its range extends, as referred 
to above, into Western and Central China. 
Cyaniris hersilia, sp. nov. (Plate xxxi. fig. 16, 2 .) 
Female. General colour of aU the wings white, suft'usod with bluish-grey scales at the base, 
neuration marked with black ; costa and outer margin of primaries broadly black ; costa of 
secondaries black, and outer margin blackish grey, enclosing a series of white inter-nervular 
lunules centred with black ; there is a distinct black discoidal bar on all the wings. Under 
surface dirty white, markings similar to those in C. argiolus, but fewer in number, and those 
of the submarginal area of all the wings often entirely absent. 
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