LYCAENID AE: NACADUBA. 145 
which was described by Mr. Wood-Mason and myself as a species allied tothe Zycena 
pactolus of Felder, but apparently distinct from 1. macrophthalma, from which, however, I 
do not think it wise to separate it. 
Next to WV. ardates, Moore, WV. macrophthalma is the commonest species of the genus, and 
males may be often met with in Sikkim at low elevations sucking up moisture from damp spots. 
Mr. Butler records this species from Borneo and Australia (Trans. Linn. Soc. Lond., Zoology, 
second series, vol. i, p. 566 (1877), it has therefore the greatest geographical range of all the 
species of the genus. The females of all the species appear to be very rare in all localities. 
720. Nacaduba pavana, Horsfield. (PLATE XXVI, Fic. 182 ¢). 
Lycena pavana, Horsfield, Cat. Lep. E. I. Co., p. 77, n. 12 (1828) ; Nacaduba pavana, Wood-Mason and 
de Nicéville, Journ. A. S. B., vol. lv, pt. 2, p. 367,n. 124 (1886); W. macrophthalma, Moore (nec Felder), 
Journ. Linn, Soc. Lond., Zoology, vol. xxi, p. 40 (1886). 
HABITAT: Java (Horsfeld), Sikkim, Bhutan, Cachar, Mergui, Andaman Isles. 
EXPANSE: ¢, ‘8 to 1'5 ; 2, 1°0 to 1'2 inches. 
DESCRIPTION : “MALE. UPppeERSIDE, doth wings pale violet-blue, which tint being almost 
equally diffused over a grayish-brown ground, has, in a certain position, a pale silvery reflexion ; 
margin terminated by a very narrow brown thread and a grayish cilia. UNDERSIDE, oth wings 
grayish-brown with a pale silvery reflexion ; forewing with seven, hindwing with ten white 
strige, of which three are marginal, continued uniformly through both wings to the anal 
ocelli, and bounded exteriorly by a deep black thread. forewing has the medial portion 
marked by two pairs of strigze. extending half across the surface, being here terminated abruptly 
at one of the longitudinal nerves ; their direction is regularly transverse, and they are slightly 
undulated ; the interior pair is short, and arises at a small distance from the costa; in the 
intermediate space a small dot is regularly opposed to each striga; the second pair touches 
the costa and reaches regularly to the disc ; inthe posterior portion of the surface one striga 
opposed to each of these pairs, is continued parallel with the other to the interior margin. In 
the Aindwing the strigse, seven in number, are not arranged in pairs, but follow nearly at equal 
distances, broken and interrupted by obscurer lines, without any curve in the anal region ; the 
basal one is minute, close to the thorax, and in some individuals very obscure; three ocellated 
spots of an intense black colour, but very unequal in size, are placed in the anal angle at 
the posterior margin ; the exterior one is very large, regularly orbicular, bounded interiorly, 
and at the sides by a very narrow yellowish-brown iris, and exteriorly by a crescent of 
silvery irrorations ; adjoining to this is an excavated irregularly-reniform spect, which touches a 
minute ocellus at the extremity of the anal angle ; the intermediate spot is marked interiorly 
with silvery irrorations and a rufous crescent, and the extreme ocellus is also slightly spangled. 
Yai brown, tipt with white. ody brown above and white underneath. Antenne brown, very 
obscurely banded with gray. FEMALE. UPPERSIDE, forewing with a defined brown border 
extending along the exterior and posterior margins, on the base and disc the violet colour 
is deeper than in the male, and the silvery gloss is more intense. /izdwing has a series of 
dark brown spots parallel with the posterior margin, of which the penultimate one, opposite 
‘the caudal appendage, has a deeper tint ; these spots are bounded exteriorly by an intense 
white thread, and interiorly by a series of obscure lunules directed outwards.” UNDERSIDE, 
both wings as in the male. (Horsfiela, 1. c.) 
This species is, perhaps, included in the Indian fauna erroneously, but as I have before 
me a large series of specimens which appear to me to be distinct from the commonest 
form of WW. macrophthalma, Felder, described in a foot-note on the preceding page, and which 
agree with Horsfield’s description of W. pavana, I prefer to include them under that 
name rather than describe them as a new species. These specimens may at once be known 
in both sexes on the underside by all the bands being white, and not sordid white as in 
N. macrophthalma, and much narrower and better defined. The male may be distinguished 
by its paler blue coloration on the upperside, and narrower outer black margin. It is, I think, 
a perfectly good and distinct species. 
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