234 LYCENID. ARHOPALA. 
f*. Male, upperside, both wings dark blue ; outer black borders narrow. 
a*. Underside, forewing with bands and spots of the ground-colour, outwardly defined with 
greyish, 
843. A. AGELASTUs, Burma, 
é*, Underside, forewing with bands and spots whitish. 
844. A. CHINENSIS,? Sikkim, South China 
g'. Male, upperside, both wings deep purple ; outer black borders narrow, thread-like. 
845. A. DAvisonu, Burma, Malay peninsula, Borneo. 
786. Arhopala centaurus, Fabricius. 
Papilio centaurus, Fabricius, Syst. Ent., p. 520, n. 329 (1775) ; idem, id., Sp. Ins., vol, ii, p. 117, n- 523 
(1781) ; idem, id., Mant. Ins., vol. ii, p. 68, n. 646 (1787); Hesferia centaurus, id., Ent. Syst. vol. iii, pt. 1, 
Pp. 275, n. 63 (1793) 3 Polyommatus centaurus, Godart, Enc. Méth., vol. ix, p. 658, n. 138 (1823); <Amblypodia 
centaurus, Horsfield, Cat. Lep. E. I. C., p. 102, n. 33 (1829) ; id., Hewitson, Cat. Lycenid@ B. M., p. 3,0. 15% 
pl. ii, figs. 10, 13, wale (? figs. 12, male ; 11, female) (1852) ; id. Moore, Proc. Zool. Soc. Lond., 1865, p. 775 3 
id., Butler, Cat. Fab. Lep.B. M.,p. 179, n. x (1869); id., Druce, Proc. Zool. Soc. Lond., 1874, p. 107, n. 13 id-, 
Butler, Trans. Linn. Soc. Lond., Zoology, second series, vol. i, p.548,n- 1 (1877); Narathura centaurus, 
Distant, Rhop. Malay., p. 261, n. 1, pl. xxi, figs. 4, wale; 5, female (1885) ; Nilasera centaurus, Moore, Journ. 
Linn. Soc. Lond., Zoology, vol. xxi, p. 44 (1885) ; Ambiypodia pseudocentaurus, Doubleday, List. Lep. B. M., 
vol. ii, p. 24 (1847); Arhopala centaurus, var. coruscans, Wood-Mason and de Nicéville, Journ. A S. B., 
vol. xlix, pt. 2, p. 234, n. 54 (1882); Polyommatus helus, Godart, Enc. Méth., vol. ix, p. 652gn. 119 (1823) 5 
Amblypodia nakula, Felder, Wien. Ent. Monatsch., vol iv, p. 395, n. 4 (1860); id., Druce, Proc. Zool, Soc. 
Lond., 1873, p- 353, n- 1; id-, Kheil, Rhop. Nias, p. 33, n. 121 (1884) ; Avhopala nakula, Felder, Reise Novara, 
Lep., vol. ii, p. 222, n. 224, pl. xxix, fig. 14 (1855); id., Moore, Proc. Zool. Soc. Lond, 1877, p. 5903 
idem., id., 1. c., 1878, p. 835 ; id., Wood-Mason and de Nicéville, Journ. A. S. B., vol. 1, pt. 2, p. 25x, n. 77 
(1881); Nilasera pirama. Moore, Lep. Cey., vol. i, p. 116, pl. xliii, figs. 3, 36, male ; 3a, female ; 3c, larve 
and pupa (1881) ; Nilasera pirithous, id., Proc. Zool, Soc. Lond., 1883, p. 531. 
Hasirar: Eastern Himalayas, Assam, Burma, Malay Peninsula, Siam, South India, 
Ceylon, Andaman Isles, Nias Island, Sumatra, Java, Borneo. 
EXPANSE: 6, 2, 1°8 to 2°4 inches. 
DEsckIPTION : Typical race centaurus, Fabricius. ‘* MALE. UPPERSIDE, doth wings dark 
violaceous-blue, [with narrow outer black margins]. Cz/éa brownish. UNDERSIDE, both wings 
ochraceous-browa. orewing with two looped spots, margined with pale bluish in the cell, and 
a subquadrate spot, inwardly margined with pale bluish and outwardly with greyish, at the end 
of the cell, a waved fascia margined with greyish crossing the wing beyond the cell, and the 
following spots margined with greyish :—one near the costa above the end of the cell, and two 
beneath the cell divided by the first median nervule ; the apical third of the wing is somewhat 
paler, and contains a marginal and submarginal dark fascia. Aindwing with the following 
spots and fascize margined with greyish :—seven basal spots, a medial transverse fascia, which 
is connected above at the second subcostal nervule with a broken macular fascia extending to 
the abdominal margin ; a marginal and two submarginal somewhat obscure fasciz ; three 
transverse marginal metallic greenish spots near the analangle. Soedy and /egs more or Jess 
concolorous with the wings. FEMALE. UPPERSIDE, d0/i wings violaceous-blue. Forewing 
with the costal and outer margins broadly fuscous. Aindwing with the costal margin broadly, 
and the outer margin narrowly, fuscous. UNDERSIDE, both wings as in the male.” 
“This is the true Papilio centaurus, Fabricius, of which I have satisfied myself by a 
comparison with the Fabrician type contained in the Banksian collection in the British 
Museum. Considerable confusion exists as to the true identity of this species, and this has 
been greatly due and is still frequently caused by the erroneous representations of the species 
given by thelate Mr. Hewitson, which seem to apply to a variety or distinct species found 
in Continental India. It is probably these figures which have induced many to consider as 
distinct the Malay butterfly described by Felder under the name of Amiblypodia nakula. 
Mr. Kirby, in his Catalogue, placed the two species as synonymous with one another ; and: 
to render the matter as complicated as possible, N. M. Kheil has recently pointed out that 
Mr. Kirby is wrong, and uses Felder’s name as distinct from the Fabrician, Mr, Butler, in 
1869, corrected this error, but his remarks appear to have been overlooked.” 
