_Upper Side._ Head and neck light brown; thorax, dark blue, clothed with white hairs; abdomen white, with a blueish tinge. Anterior wings next the body white, occupying more than one half. The tips are black, which colour runs along the anterior and external margins, encircling a large spot of a deep orange, whereon are four small triangular black spots. Posterior wings wholly white, and very slightly dentated. _Under Side._ The mouth, breast, and feet are ash-coloured. Anterior wings next the body white; the extremities of a deep flesh colour, sprinkled over with a great number of small dark brown streaks. Posterior wings of a yellowish flesh colour, and covered with small dark brown streaks. M. Boisduval has formed the present species, and another large Pieridean, into the genus Iphias, which differs from Thestias, and Mancipium (Anthocharis Bdv.), in the structure of the antennæ. The larva and pupa of this species are described and figured by Dr. Horsfield, in his Lepidoptera Javanica, pl. 3, fig. 7, and 7a, (copied by Boisduval, pl. 2A. fig. 3.). The former is long subcylindrical, with the dorsal segments somewhat rugose, being transversely shagreened; it feeds upon the Capparis. The pupa is navicular, the head being produced into a point. The female imago differs from the figure here given (which represents the male), in having the black markings more diffused. PLATE XI. [Illustration] PAPILIO PHILENOR. Plate XI. fig. 1. and 4. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Papilionidæ, _Leach_. GENUS. PAPILIO, _Auct._ PAP. PHILENOR. Alis dentatis nigris, posticis caudatis virescenti-nitidis maculis albis, subtus maculis fulvis albo notatis serieque digestis. (Expans. Alar. unc. 3¾). SYN. PAP. PHILENOR, _Linn. Mant._ (1771). 6. 535. _Fabr. Syst. Ent._ _p._ 445. _No._ 12. _Smith and Abbot_, _Ins. Georgia_, _Vol._ 1. _tab._ 3. _Encycl. Méth._ 9. 40. _Boisduval_, _Hist. Nat. Lepid._ 1. _p._ 324. _No._ 167. _Boisd. et Leconte_, _Icon. Lep. Amer. Sept._ _pl._ 11. _f._ 1-4. _Say_, _American Ent. Vol._ 1. _pl._ 1. Pap. Astinous. _Drury_, _App. Vol._ 2. (1773). _Cramer_, 208. A. B. HABITAT: North America, from New York to Georgia. {21}_Upper Side._ Head and neck black, with two small white spots between the antennæ at their base, and eight more on the head and neck. Thorax black. Abdomen of a glossy hue. Anterior wings black, with a very glossy greenish tinge at the anterior angle, with eight small, white, narrow crescents on the external margin of each, which make them appear as if dentated. Posterior wings of a dark glossy green, with two tails issuing from them. The concave part of each scollop is edged with white; and six whitish spots run along their edges, meeting below the extremity of the body.