Remarks.—I am somewhat doubtful of the species, the female only being known; but it differs so strikingly from the same sex of P. Nox and P. Noctis (the former of which seems very constant), that I think it better to separate it in order to draw attention to other specimens that may exist in collections. It differs from P. Nox (♀) by its narrower and more elongate hind wings, which are black, glossed with steel-blue; the fore wings are black, with the veins beyond the cell clearly white-margined. The lower margin is also much less strongly dentated.
20. Papilio Varuna, White.
♀. P. Varuna, Wh., Entomologist, 1842, p. 280; Westw. Ann. Nat. Hist. ix. p. 37. P. Chara, Westw. Arc. Ent. pl. 66. f. 2.
♂. P. Astorion, Westw. Ann. Nat. Hist. ix. p. 37; Arc. Ent. pl. 66. f. 1.
Hab. Pulo Penang, Sylhet.
21. Papilio Semperi, Felder.
P. Semperi, Feld. Lep. Nov. Philipp, pp. 1, 11.
Hab. Luzon, Philippines (♂, ♀).
N.B. The Philoxenus group peculiar to India follows on after these.