Subspecies _b_ (_Celebensis_).—Fore wings in the male more attenuate, with the costal margin more curved than in true _P. Codrus_; upper surface more green and glossy; an additional large quadrate spot on the inner margin of the fore wings. Under surface lighter brown, the whitish marks near the anal angle wanting; a dark subtriangular band across the cell of the fore wings. Rather smaller than _P. Codrus_. _Hab._ Celebes, Sulla Islands (_Wall._). Subspecies _c_ (_Papuensis_).—Hind wings less elongate than in the true _P. Codrus_; macular band much broader, and reaching the inner margin of the upper wings, the lower portion divided by nervures only; the band continued on the lower wings by means of an obscure white fascia. Beneath, the greenish white band continues on to the lower wings, but gradually fades away after reaching the cell. Expanse of wings 4¼ inches. _Hab._ Waigiou, Aru Island (_Wall._). _Remarks._—This approaches the next species. Subspecies _b_ and _c_ I consider to be really as distinct as many universally received species, differing in form and in several points of coloration. As, however, it is probable that there are forms in other islands which may present intermediate characters, I prefer retaining the whole under the old specific name. 107. PAPILIO MELANTHUS, Felder. _P. Melanthus_, Feld. Lep. Nov. Philipp. p. 12. _Hab._ Mindanao (Philippines). 108. PAPILIO EMPEDOCLES, Fabricius. _P. Empedocles_, Fab. Ent. Syst. iii. 1. p. 70; Don. Ins. Ind. pl. 17. f. 1; Boisd. Sp. Gén. Lép. p. 229. _Hab._ Borneo (_Wall._). 109. PAPILIO PAYENI, Boisduval. _P. Payeni_, Bd. Sp. Gén. Lép. p. 235; Van der Hoeven, Tijd. von Nat. Gesch. v. t. 8, f. 1, 2, 6. _Hab._ Borneo (_Wall._), Java (_Van der Hoeven_). _Remarks._—This remarkable species has been placed by Boisduval in a group by itself. It, however, agrees very closely in habits and structure with this group, and can hardly, I think, be separated, though very abnormal in colouring. _P. Evan_, Db., is a closely allied species from India; and _P. Gyas_, Westw., from the same country, is also nearly related, though it has been hitherto placed in another section of the genus. 110. PAPILIO SARPEDON, Linnæus. _P. Sarpedon_, L.; Cram. Pap. Ex. t. 122. f. D, E.; Boisd. Sp. Gén. Lép. p. 235. _Chlorisses Sarpedon_, Sw. Zool. Ill. 2nd ser. pl. 89. _Hab._ Borneo, Sumatra (typical), New Guinea, Aru Is. (darker), Java (broader band) (_Wall._). Local form _a_ (_Moluccensis_, Cram. Pap. Ex. t. 122. f. D, E).—Black, with the bands and spots rich blue. _Hab._ Ceram, Batchian, Gilolo, Bouru (_Wall._). (The Ceylon form closely resembles this.) 111. PAPILIO MILETUS, n. s. Tab. VII. fig. 2 (♂). Wings larger and more falcate than in _P. Sarpedon_, costal margin abruptly curved near the base of the wing.