_Upper Side._ The antennæ and head are of a reddish brown; the former are strongly pectinated, and very broad in the middle, but at the extremities very narrow and curled. Thorax dark brown. Abdomen reaching half an inch below the wings of a reddish dun colour. Anterior wings dun colour; with a large spot or patch, of a darker colour, situated on the posterior margin, near the base. Two indented black lines run obliquely from the anterior edge, near the tip, to the posterior near the middle; the space between them being rather lighter than the rest. Posterior wings dun colour, immaculate. All the wings, both on the under and upper sides, appear very shining and glossy; the scales or feathers appearing, when viewed through a microscope, very coarse and long. There is no tongue discoverable in this moth. _Under Side._ Breast and sides bright dun. The abdomen reddish dun. All the wings dun-coloured. The lower indented line appears faintly through the wing, of a dark brown colour, also a faint reddish brown indented line runs across the posterior wings. The edges of all the wings are entire. This insect, which appears to have been overlooked by modern authors, seems to form a connecting link between Zeuzera and Gastropacha, agreeing with the former in the general form, and with the latter in the transverse denticulated fasciæ on the anterior wings, and the curved antennæ feathered to the tips. {31}PLATE XVII. [Illustration] PAPILIO POLYDAMAS. Plate XVII. fig. 1. 2. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Papilionidæ, _Leach_. GENUS. PAPILIO (Equit. Troj.) _Linn._ PAP. POLYDAMAS. Alis dentatis, nigro-virescentibus, fasciâ communi interruptâ flavâ, posticis subtus maculis linearibus flexuosis rubris, tribus argenteis adjectis. (Expans. Alar. unc. 4.) SYN. Pap. Polydamas. _Linn. Syst. Nat._ 2. 747. _No._ 12. _Merian. Surinam. pl._ 31. _Cramer Pap._ 18. _p._ 33. _pl._ 211. _f._ D. E. _Herbst. Pap. t._ 10. _f._ 6. 7. _Boisd. et Leconte Icon. des Chen. de l'Amer. Sept. pl._ 1. _Boisd. Hist. Nat. Lep._ 1. 321. _No._ 162. HABITAT: America, from Georgia to Brazil, Antigua (_Drury_). _Upper Side._ The head and thorax are black; with two red spots on the neck, and two small white spots at the base of the antennæ. All the wings are scolloped, and of a dark green colour. The anterior wings have a row of yellow spots rising near the tips, which, running across the middle of the inferior ones, in a circular manner, meet at the extremity of the body; some of them being shaped like the bearded points of arrows. The hollow or concave part of each scollop, in the inferior wings, is edged with yellow.