LYCANIDAS. CASTALIUS. 20% 
“A male taken by me at Ikuya, Little Nicobar. The prehensores are quite distinct from 
those of the next species [C. @iravati, Doherty]. The species is without metallic markings 
either above or below. Felder’s female, with which this male seems conspecific, is, as he remarks, 
distinguished from C. voxus, Godart, and allied species by the absence of all white at the base 
of the cesta of the hindwing below. This also distinguishes it from C. airavati, Doherty. 
The unbroken transverse discal band of the hindwing distinguishes the two Nicobarese 
species from all others. The female has, according to Felder, white marginal spots on 
both (?) wings above.” (Doherty, |. c.) 
Through the kindness of Mr. W. Doherty I have seen the unique specimen in his 
possession described as above. On the underside the black markings occupy quite one-half 
of the surface; in €. roxus they do not occupy more than one-fourth. ‘The two species 
seem to be abundantly distinct. ; 
765. Castalius elna, Hewitson. 
Lycena elna, Hewitson, Ex. Butt., vol. v, Zycena pl. 1, fig. 8, female (1876); Castalius elna, Moore, 
Proc. Zool Soc, Lond., 1877, p. 587 3 id., Wood-Mason and de Nicéville, Journ. A. S. B., vol. 1, pts 2, p. 248, 
n. 50 (1881) ; id., Distant, Rhop. Malay., p. 217, n. 4, pl. xx, fig. 4 (1884). 
HasitaT: Sikkim, Bhutan, Assam, Orissa, Upper Tenasserim, South Andaman Tes 
Malay Peninsula, Java. 
EXPANSE: ¢, 9, 1'2 to 1°4 inches, 
DESCRIPTION : MALE and “FEMALE. UPPERSIDE, both wings dark brown, crossed 
by a common broad white band commencing at the first discoidal nervule of the forewing 
where it is marked by a minute black spot and projects outwards. UNDERSIDE, both wings 
white, crossed near the base by a broad band of black [elbowed in the forewing]. orewing 
with a large spot near the apex, a similar spot near the anal angle, the apex, the outer margin; 
and a spot at its middle, all black. Azzdwing with a spot near the apex, a quadrifid band 
above the anal angle, the outer margin, and a submarginal series of lunular spots, all black.” 
( Hewitson, 1. c.) 
“ Specimens of both sexes from the Andamans are variable in the size and connections of 
the black spots and bands of the underside, and want the minute black spot at the anterior end 
of the common white band of the upperside.” (Wood-Mason and de Nicéville,\. c.) 
This is a very common species in Sikkim. In the rains form the white discal band of the 
upperside is very narrow, in some specimens not more than 16 of an inch in width on the 
forewing, the markings of the underside deep black. In those specimens which occur in 
the cold dry weather the discal white band on the upperside of the forewing occupies half 
the wing, while all the hindwing is white, except a narrow black basal band, and a 
narrow marginal similar band. On the underside the ground-colour in this form, instead of 
being white, is suffused with cinnamon colour, and the markings, instead of being black, are 
cinnamon-brown, approaching to black on the costa, at the anal angle, and at the base of the 
forewing only. I am not a little surprised that this very distinct seasonal form should have 
hitherto escaped being described as a “ new species.” 
The occurrence of this species in an isolated locality like Orissa is not a little remarkable, 
though that district shows many similar instances. It isa common species in the Andaman 
Isles, but does not appear to occur in the Nicobars, and it is recorded by Mr. Distant from 
Sunjei Ujong, Malacca, and Singapore in the Straits Settlements. 
766. Castalius decidia, Hewitson. 
Lycena decidia, Hewitson, Ex. Butt., vol. v, Lycena pl. i, fig. 4 (1876) ; Castalius decidia, Moore, Lep. 
Cey., vol. i, p. 84 (1881); C. hamatus, id., l.c., p- 84, pl. xxxvi, figs. 6, 6a (1881); C. interruptus, de 
Nicéville, Journ. A. S. B., vol. lii, pt. 2, p. 74, n. 13, pl. i, fig. 12, female (1883); id., Moore, Proc. Zool. 
Soc. Lond., 1883, p. 523, pl. xlviii, fig. 4. 
HasiratT: Bombay, Rohilkund Terai, Malda, Sikkim, Assam, Burma, Orissa, Ganjam, 
Nilgiris, Travancore, Ceylon, 
26 
