_Upper Side._ Antennae black. Neck spotted with grey. Thorax and abdomen black. Anterior wings next the body black brown, but at the tips russet, or dark hair-coloured; about a quarter of an inch from thence are two small white spots placed on each wing, near the anterior margin; near the middle is a short white bar, crossed by the black nerves of the wing, whose under part joins to a patch of blue which runs to the posterior margin. Posterior wings next the body black brown, but along the external edges a little lighter. A white bar on each rises at the abdominal groove, and runs to the middle of the wing towards the anterior edge, being margined with blue which seems to shoot in rays; a row of twelve small white spots runs along the external edge in pairs. _Under Side._ Palpi, neck, and breast black brown, spotted with white. Anterior wings russet, darkest next the body; the white spots and bar being very plain on this side, with the addition of a row of white spots running half way along the external edges. Posterior wings russet, with the same marks and spots as on the other side, but rather of a pearl colour. Margins of the wings dentated, the indentings being white. PIERIS PASITHOE. Plate VIII. fig. 3, 4. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Papilionidæ, _Leach_. GENUS. PIERIS, _Schrank. Latr. God. Boisduval. Pontia p. Ochs._ Papilio (Dan. Cand. or Heliconii), _Linn. Drury, &c._ PIERIS PASITHOE. Alis suboblongis nigris, suprà coerulescenti-albo-maculatis, posticis subtùs disco flavo, nigro venoso, fasciâque baseos ferrugineâ incurvâ. (Expans. Alar. 3 unc. 6 lin.) SYN. Papilio (Helicon.) Pasithoe, _Linn. Syst. Nat._ 2. 755. _No._ 53. _Fabr. Ent. Syst._ III. 1. _p._ 179. Papilio (Dan. Cand.) Dione, _Drury, App. vol._ 2. Papilio Porsenna, _Cramer, pl._ 43. _fig._ D. E. _& pl._ 352. _fig._ A. B. Pieris Pasithoe, _Enc. Méth._ ix. _p._ 148. _Boisduval Hist. Nat. Lep._ 1. _p._ 451. HABITAT: India (_Drury_). China, Bengal (_Boisduval_). {17}_Upper Side._ Antennæ black. Head, thorax, and abdomen dirty black. Wings soot-coloured, or dirty black, having a small white spot in the middle of the anterior; a row of oblong white spots runs from the anterior edge to the lower corner, some being pointed and placed a little distance from the tips; base of the wings powdered with white dust, increasing to a clear white as it recedes from the body. The posterior wings powdered in the same manner; and having four pointed white spots on each, crossing them from the upper to the abdominal corners. Abdominal groove yellow, extending towards the middle of the wing.