_Under Side._ Anterior wings, at the base, deep clay-coloured, with some dark brown clouds on the anterior edges and interior angles; but in some these clouds are hardly perceptible. In some a small scolloped line runs along the external edges, from the tips to the lower corners, of a reddish hue; in others this is not to be seen, having a dark brown border in that part. Posterior wings very pale clay-coloured, with a cloud on the middle of the external edges, of a reddish brown; where (in some) is a silver spot like a half moon. The black pupils of the six ocelli, seen on the upper side, are, in some specimens, very small here, and just perceptible; in others they are not to be seen. "In short, nature forms such a variety of this species, that it is difficult to set bounds, or to know all that belongs to it."--_Drury._ PLATE XXII. [Illustration] PAPILIO THOAS. Plate XXII. fig. 1. 2. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Papilionidæ, _Leach_. GENUS: PAPILIO, _Auct._ PAPILIO THOAS. Alis suprà nigris, fasciâ communi lunulisque submarginalibus flavis, posticis caudatis, his subtus maculâ discoidali ferrugineâ lunulisque coeruleis. (Expans. Alar. 4 unc. 9 lin.) SYN. Papilio (Equ. Ach.) Thoas, _Linn. Mant. p._ 536. _Fabr. Ent. Syst._ III. 1. _p._ 32. _No._ 94. _Cramer, pl._ 167. _fig._ A. B. _Latr. et God. Enc. Méth._ ix. _p._ 62. 103. _Boisduval et Leconte Icon. Lep. Amer. Sept. pl._ 12. _et_ 13. _Boisd. H. n. Lep._ 1. _p._ 355. Var. Pap. Cresphontes, _Cramer_, 165, 166, A. HABITAT: Surinam (_Drury_). Paraguay to Georgia (_Boisd._). _Upper Side._ Thorax black. Two small yellow streaks extend from the eyes to the shoulders. Abdomen yellow, with a black dorsal line; apex red brown. Wings black, with deep yellow spots on them. A yellow bar, near half an inch broad, begins at the middle of the superior wings, and running parallel with the anterior edges, crosses the inferior ones just below the shoulders. Several oval and oblong yellow spots are placed between the tips and this bar. One also is situated close above it, near the middle of the wing; being separated from it by the tendon, which is black. Below the bar are four small spots, beginning at the interior angle (the first being double). Posterior wings furnished with two black tails, having a long yellow stripe in the middle. About a quarter of an inch above the external edge is a row of six yellow spots, whereof one is obscured by the anterior wing; there being but five shewn in the plate.