_Under Side._ Breast, legs, and abdomen black; the sides spotted with cream-coloured spots, one of which appears on the inferior wings, on each side the breast. Anterior wings, next the tips, are of the colour of soot; but next the body, black, with five whitish spots on the external margin, near the interior angle. The upper part of the posterior wings, next the body, are soot-coloured; the remaining parts of them being of a glossy blue, with seven dark orange spots, placed in a circular manner, a little distance from the edge, and meeting at the extremity of the body: each spot is encircled with black, except in that part where a small silver mark appears on its edge, being represented in the plate by white. The scollops are deeper edged on this side with white than on the upper. This butterfly is one of the most beautiful, and, at the same time, most common of the North American species; abounding wherever the Aristolochia serpentaria grows, the larva feeding upon that plant. It is described by Boisduval and Abbot, and is brown, with four rows of small fulvous tubercles, and a row of brown spines near the legs; moreover, it has two long spines directed forwards upon the first segment, three upon the penultimate, and two upon the tenth segment. The neck is also furnished with a furcate retractile reddish tentacle; the chrysalis is of a violet grey, or reddish colour, with two yellow spots, the head being truncate. The female is larger, with brown-coloured wings, with cupreous reflections. The insect assumes the chrysalis state on the 26th of April, and the fly appears on the 4th of May. Another, observed by Abbot, went into chrysalis on the 21st of June, and the butterfly came out on the 5th July. The latter delights to frequent the blossoms of the peach and other trees in the spring. PAPILIO ASTERIAS. Plate XI. fig. 2. 3. and 5. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Papilionidæ, _Leach_. GENUS. PAPILIO, _Auct._ PAPILIO ASTERIAS. Alis dentatis nigris, fasciâ maculari maculisque marginalibus flavis; posticis caudatis, angulo ani fulvo, puncto atro, abdominis dorso duplici serie punctorum flavorum. (Expans. Alar. 3 unc. 6 lin.--4 unc.) SYN. PAPILIO ASTERIAS, _Fabr. Mant. Ins._ _tom._ 2. _p._ 2. _No._ 13. _Ent. Syst._ III. 1. _p._ 6. _No._ 16. _Cramer_, _tab._ 385. _f._ C. D. _God. Enc. Méth._ ix. _p._ 58. _No._ 91. _Boisduv. et Lec. Icon. Lep. Amer. Sept._ _pl._ 4. _Boisd. Hist. nat. Lep._ 1. 332. _No._ 175. Papilio Troilus, _Drury_, _App. Vol._ 2. _Abbot and Smith, Ins. Georg._ 1. _t._ 1. (_exclus. Syn. Linn. et Fabr._) HABITAT: New York, Maryland, Carolina, Virginia (_Drury_).