In all the Plates, the wings on one side of each figure are detached from the body, and represent the _under surface_ of the same insect. In one case only (Tab. VII. f. 1.) the upper surfaces of two varieties of the same species are given. _P. Noctis_, Hewits. Proc. Zool. Soc. 1859, p. 423, pl. 66. f. 5 (♀). _Male_: differs from the same sex of _P. Nox_ by the broader apex of the fore wings, and by the hind wings being more elongate, more glossy, and especially by the entire nondentated hinder margin. _Hab._ Borneo (Sarawak) (_Wall._), (♂, ♀ Mus. nost.) 19. PAPILIO EREBUS, Wallace. _P. Nox_, var., De Haan, Verh. Nat. Gesch. t. 5. f. 3 (♀). _Hab._ Malacca (_Wall._), Banjermassing, Borneo (_De Haan_). _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. b. _Coon_ group. 22. PAPILIO NEPTUNUS, Guérin. _P. Neptunus_, Guér. Deless. Voy. dans l’Inde, p. 69, t. 19 (_P. Saturnus_). _Hab._ Malacca, Borneo (♂, ♀) (_Wall._). 23. PAPILIO COON, Fabricius. _P. Coon_, Fab. Ent. Syst. iii. 1. pp. 10, 27; Don. Ins. China, pl. 24. f. 1; Lucas, Lep. Ex. t. 6. f. 2; Boisd. Sp. Gén. Lép. p. 201. _Hab._ Java, Sumatra (_Wall._), Borneo (_De Haan_). _Remarks._—The specimens from Sumatra are constantly larger than those from Java. The Indian form, in which the markings are red instead of yellow, with other differences, I consider a distinct species, for which I propose the name of _P. Doubledayi_, after the late Mr. Edward Doubleday of the British Museum[13]. Footnote 13: PAPILIO DOUBLEDAYI, Wallace. (_P. Coon_, var., B. M. Cat.)