236 LYCANIDZ. ARHOPALA. 
anal angle. FEMALE. UPPERSIDE, doth zwings purplish-blue, merging to greyish-blue at the 
base ; marginal bands broad. UNDERSIDE, 40th wings as in the male.” 
“Ts nearest allied to the Javan MV. [= 4. ] pseudocentaurus, Doubleday, and is quite distinct 
rom both the Indian J, centaurus, Fabricius [at this date Mr. Moore had not realized that 
the true cenfaurus and nakula are one species, nor discriminated his N.-E. Indian species 
A. pirithous], and the Malayan M. nakula, Felder.” 
‘ Larva elongated, oval, depressed, anterior segment scutate ; finely pilose along the 
sides ; colour green, with dorsal and lateral reddish marks, and an intervening subdorsal 
slender black line. Feeds on Schleichera trijuga. PUPA green; dorsal segments reddish.” 
(Moore, 1. c.) 
This Jocal race is confined to South India and Ceylon. It is a very much better species 
than A, firithous, Moore, as both sexes can be discriminated by their brilliant blue (not dull 
purple) colour on the upperside. In Ceylon it occurs at “ Kandy and Galle. Common ; but 
settles rather high” (Wade). “Colombo, and low country” (A/ackwood), It occurs also in the 
Nilgiris, North Canara, and Travancore. 
Local race covuscans, Wood-Mason and de Nicéville. DerscripTion: “‘ MALE and 
FEMALE, UPPERSIDE, 40th wings with the base, but especially in the female, lighter, with a 
greenish tinge, so that the whole medial portion appears brilliantly illuminated by a pale 
greenish-blue reflection in most lights.” (Wood-Mason and de Nicéville, 1. c.) 
This local race is confined to the South Andaman Isles, where it appears to be fairly 
common. The male may be known from A. fivama on the upperside by its more 
brilliant and lighter blue coloration, and in the female the brilliant basal blue portion is 
lighter and also better defined from the darker deep blue portion beyond. 
There is yet another local form, the A. psesdocentaurus of Doubleday, described fully 
by Dr. Horsfield under the name of cenfaurus, Fabricius. As it occurs in Java only, I do 
not give a description of it. It appears to come near to the local races Aivama and coruscans. 
To sum up. A. centaurus is one of the commonest species of the genus where it occurs 
(at low elevations in Sikkim it may be disturbed in great numbers by shaking the lower 
branches of Sal trees), and is also one of the widest-spread. On the underside it is apparently 
variable wherever it occurs, the ground-colour in some examples is very pale, the dark 
markings standing out conspicuously, in others the ground-colour is dark, and the markings 
are consequently obscure. The presence of the irrorated green scales at the anal angle is 
very variable : in some specimens there is a large patch of these scales, in other examples such 
scales are entirely wanting. The species has developed several local races, which are of different 
value, fseudocentaurus, coruscans, and pirama forming one group, the true cextfaurus and 
pirithous another. 
787. Arhopala agnis, Felder. 
A. agnis, Felder, Reise Novara, Lep., vol. ii, p. 228, n. 252 (1865); id., Staudinger, Ex. Schmett., 
p. 281, pl. xcvi, male (1888) ; Amblypodia agnis, Hewitson, Ill, Diurn, Lep., p. 14a, n. 74 (1869); Narathura 
agnis, Distant, Rhop. Malay., p. 262, n. 2, pl. xxi, fig. 29, /emale (1885); Amblypodia anarte, Hewitson, 
Ill. Diurn. Lep., p. 4, n. 8, pl. 1, figs. 6, 7, female (1863). 
HABITAT : Malacca interior (Fe/der), Sumatra (ewitson), Malacca, Perak (Distant), 
Mergui, Upper Tenasserim (Doherty). 
EXPANSE: ¢, 2°00 to 2°40; 2, 2°35 to 2:45 inches. 
DescripTION: ‘‘MALE. Uppersipe, doth wings brilliant violet-blue, very narrowly 
blackish-fuscous along the margins, indwing darkening with blackish along the interior 
margin, ¢ai/ with a white tip. UNDERSIDE, doth wings pale brownish, with a doubleseries of 
whitish, narrow, exterior lunules. /ovewing pale on the interior third of the surface, and with the 
following markings of a little deeper tint than the ground-colour, and margined with whitish :— 
two annular marks in the cell, a spot at the end of the cell, another above the origin of 
the first median nervule, and a narrow, exterior, chain-like fascia, formed of six spots, and 
twice broken. Aindwing with the following markings of a little deeper tint than the ground- 
