The white patch on the lower wings reduced to a small spot, or quite absent. There are many varieties of this, showing very instructively how such isolated forms of female as occur in the two preceding species may have been produced by simple variation followed by a “natural selection” of the forms best adapted to special conditions. _Hab._ Philippine Islands (_B. M._) 65. PAPILIO NICANOR, Felder, ‘Voyage of the Novara,’ pl. ... f. _c_, _d_. _Male._ Upper side:—like _P. Alphenor_ ♂; but the band of white spots is broader and more regular, and there is a row of four white submarginal lunules. Under side as in _P. Alphenor_; but the marginal spots of the upper wings, and the submarginal lunules of the lower wings, are larger and more distinct. _Female_ quite tailless, like the male. Upper side:—like _P. Alphenor_ ♀; but the rufous anal spots are much smaller, not forming an ocellus at the anal angle, and they do not join the white central patch. Under side, differs from _P. Alphenor_ in nearly the same manner as on the upper side. _Hab._ Batchian, Gilolo, Morty Island (_Wall._). _Remarks._—The absence of tails in the female, and the white submarginal lunules in the male, distinguish this at a glance from all its allies. It has a comparatively restricted range, and is very constant in both sexes. The plate sent me by Dr. Felder is not numbered. 66. PAPILIO HIPPONOUS, Felder[14]. Footnote 14: Having obtained a specimen of this insect while these sheets are passing through the press, I find that it should have been placed next to _P. Severus_. _P. Hipponous_, Feld. Lep. Nov. Philipp. p. 12; _P. Dironus_, B. M. List (no description). _Hab._ Luzon, Mindanao (Philippines). 67. PAPILIO AMBRAX, Boisduval. _P. Ambrax_, Bd. Sp. Gén. Lép. p. 218; Voy. au Pôle Sud, Lép. t. 1. f. 3, 4 (♂); De Haan, Verh. Nat. Gesch. t. 7. f. 2 (♀). _P. Orophanes_, Boisd. Sp. Gén. p. 275 (♀). _Hab._ Mysol, Salwatty, Dorey (_Wall._). _Remark._—I believe that two, if not three, well-marked forms or species have been mixed up under the name of _P. Ambrax_, as I have endeavoured to show by the references. My specimens of the two sexes of each show a uniformity of character in each locality. 68. PAPILIO AMBRACIA, Wallace. _P. Ambrax_, Bd.; De Haan, Verh. Nat. Gesch. t. 7. f. 1 (♂). _Male._ Differs from _P. Ambrax_, Bd., by the ashy-white patch at the apex of the anterior wings. _Female._ Has a large, roundish, white patch on the anterior wings, extending from the discoidal cell to the hinder angle. The red lunules on the hind wings are smaller. Same size as _P. Ambrax_. _Hab._ Waigiou (♂, ♀) (_Wall._). 69. PAPILIO EPIRUS, n. s.