_Under Side._ Palpi, breast, and sides white. Legs black. Abdomen white. Anterior wings white, with some dark brown markings running along the anterior and external edges, whereon are some white streaks and patches. Posterior wings white, whereof one-third next the external edges is dark brown, but next the cilia is whitish; whereon are six small round brown spots, two of which, next the abdominal corners, sparkle with blue like a sapphire; the upper parts of these wings, next the shoulders, have a brown double streak on each. All the wings are entire. PLATE IV. [Illustration] PAPILIO NIREUS. Plate IV. fig. 1, 2. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Papilionidæ, _Leach_. GENUS. PAPILIO, _Linn. &c._ (Section Equit. Achiv.) PAPILIO NIREUS. Alis dentatis, nigris, fasciâ communi maculisque viridibus; posticis breviter caudatis; his subtus fasciâ subargenteâ, marginali, nervis divisâ. (Expans. Alar. unc. 4. lin. 8.) SYN. Papilio Nireus, _Linn. Syst. Nat._ 2. _p._ 750. _No._ 28. _Fabr. Ent. Syst._ III. 1. _p._ 36. _No._ 106. _God. Enc. Méth._ ix. _p._ 48. _No._ 67. _Cram._ 187. A. B. & 378. F. G. _Herbst. Pap. tab._ 37. _f._ 1. 2. _Boisduval. Hist. Nat. Lepid._ 1. 224. HABITAT: Sierra Leone (_Drury_). Coast of Guinea, Caffraria, Madagascar (_Bdv._). India (_Linn. & Fabr._). _Upper Side._ Head, thorax, and abdomen velvety black. Wings fine deep black; with two narrow bars of a beautiful Saxon or blueish green colour, which begin about the middle of the anterior edges of the anterior wings, and crossing both them and the posterior, meet at the abdominal edges near the {7}abdominal corners, running parallel with the external edges. Anterior wings with two small blue spots placed on each near the tips, and another, larger, divided into three by the nerves, near the middle of the anterior edge; being placed at the top and even with the bar, but divided from it by a small separation of black. The edges of these wings are entire. Posterior wings with six blue spots on each, placed along the external edges; the four lower ones being in pairs, and another small one at the abdominal corners; margins deeply angulated. _Under Side._ Breast and sides dark brown, spotted with white. Abdomen brown. Wings dark brown hair-coloured, immaculate, except the posterior ones, which have a row of eleven cream-coloured spots running along the external edges.