LYCENID. CASTALIUS. 199 
C. ethion is a very beautiful species, the iridescent blue of the upperside of the male being 
of a very lovely shade. The female lacks this colour altogether, its place being taken by black. 
Mr. G. F. Hampson states that it is common on the lower slopes of the Nilgiris.” In 
Ceylon it occurs at Galle and Kandy, very common (Wade). There are two old specimens from 
Sylhet and the Naga Hills in the Indian Museum, Calcutta (these localities however require 
confirmation); it occurs at Chittagong, and Dr. J. Anderson obtained it in the Mergui 
Archipelago. Mr, Distant records it from Sunjei Ujong and Malacca, and Mr, Butler from 
Singapore, all in the Malay Peninsula. 
762. Castalius airavati, Doherty. (Frontispiece, Fic. 133 3). 
C. airvavati, Doherty, Journ. A. S. B., vol. lv, pt. 2, p. 261, n. 16 (1886), 
HasBitaT: Gonyi, Great Nicobar, 
EXPANSE: 6, 1°33; 9, I°2 inches. 
DescriPTION : *‘ Allied to C. ethion, Doubleday and Hewitson. MAtLr, UPPERSIDE, doth 
wings light, shining blue, the outer borders broadly, and the costa of the forewing narrowly black ; 
a white band crosses both wings which has its upper part wide in the forewing, centering between 
the third median and lower discoidal nervules, thence to the hind margin it is slender and 
almost obsolescent; on the hindwing it is narrow and angular. UNDERSIDE, both wings 
with the ground ochreous-white (it is white in C, e¢4io7z), pure white on the lower part of the 
forewing. It differs from C. ethion below in the increased size of all the black markings. 
The transverse discal band across the hindwing, though irregular, is continuous, its two parts 
very close together, the upper one is widely united near the costa with the outer of the two 
oblique basal stripes ; the latter are united in both wings, enclosing a narrow white band. 
The two lines of submarginal spots are less equal and regular than in C. e¢hion, the inner 
one being very large and forming an almost continuous and very heavy lunular line; the 
anal and subanal black spots are edged with silvery blue. Tail shorter than in C. manluena, 
Felder.” (Doherty, 1. c.) FEMALE. UPPERSIDE, doth wings entirely lacking the blue gloss 
of the male; the discal white band rather broader. UNDERSIDE, J0/4 wings as in the male. 
Mr. E. H. Man has sent me four males and two females of this species from Great 
Nicobar. It is a very distinct as well as beautiful species. In only one of my specimens is 
the discal black band on the underside of the hindwing united near the costa with the outer 
of the two basal bands, as will be seen from my figure of the species. 
The figure shows both sides of a male specimen from Great Nicobar in my collection. 
763. Castalius roxus, Godart. 
Polyommatus rvoxus, Godart, Enc. Méth., vol. ix, p. 659, n. 142 (1823); Lycena voxus, Horsfield, Cat. 
Lep. E. I. C., p. 70, n. 5, pl. ii, figs. 4, 4a, female imago; 46—/, structure of imago (1828) ; Cupido roxus, 
Druce, Proc. Zool. Soc. Lond., 1873, p. 348, n. 3 3 Castalzus roxus, Butler, Trans. Linn. Soc. Lond., Zoology, 
second series, vol. i, p. 547, n. 3 (1877); id., Moore, Proc. Zool. Soc. Lond., 1878, p. 833; id., Wood-Mason 
and de Nicéville, Journ. A. S. B., vol. 1, pt. 2, p. 248, n. 51 (1881); id., Distant, Rhop. Malay., p. 216, n. 
3, pl. xxii, fig. 24, wale (1834); id., Elwes and de Nicéville, Journ. A. S. B., vol. lv, pt. 2, p. 428, n. 92 (1886), 
HasitraT : Andaman Isles, Burma, Malay Peninsula, Sumatra, Java, Borneo, Philippines. 
EXPANSE: @, 9, I'1 to 1°2 inches. 
DescrIPTION: “ MALE. UPPERSIDE, doth wings blackish-brown, with a very broad band 
of yellowish-white, situated on the posterior edge [inner margin], arising on the disc of the fore- 
wing, and passing obliquely over the disc and base of the hindwing. Ci/ia grayish. UNDERSIDE, 
both wings white, inclining to pale yellow ; witha broad fascia of blackish-brown, extending from 
the middle of the costa of the forewing obliquely over the base of the hindwing to the thorax ; 
at the point where it meets the costa commences a curved, irregularly-interrupted macular 
fascia, consisting of diversified spots and patches of blackish-brown. /orewing has exterior to 
this a narrow brown margin, regularly waved at its inner edge, bearing a row of oblong 
yellowish spots. Mindwing has a series of uniform lunule directed outwards, touching 
a narrow black marginal streak and inclosing a series of white lineolz, in continuation 
