_Under Side._ Breast and abdomen ash-coloured; along the latter are five dark spots (the middle ones the largest) placed at the bottom of the five segments near the breast. Anterior wings dark hazel, immaculate. Posterior wings of the same colour along the anterior and external margins; but next the shoulders and inner edges are of a grey ash colour; a dark coloured line begins near the anal angle, {50}where it is almost black, and runs across the wing, ending at the middle of the anterior edge; from whence to the middle it resembles a row of arches joined together. The caterpillar of this insect, according to Abbot and Smith, is brown, with four dorsal dark flesh-coloured lines, and a series of short lateral oblique cream-coloured marks united together over the legs. It feeds upon the sweet potatoe plant (Convolvulus Batatas, Linn.), and is sometimes frequent though the moth is rare. The chrysalis is chesnut, with a long curved tongue case, the extremity of which is recurved. It is often dug up with the potatoes. In Virginia one of these insects buried itself October 3rd, and came forth in the perfect state on the 30th of May; whilst one observed in Georgia went into the ground on the 20th of August, and came out the 11th of September. This species was considered by Drury and Smith as a climatal variety of the Europæan Sphinx Convolvuli. Fabricius, however, considered it distinct, and designated it by the specific name adopted above. PLATE XXVI. [Illustration] GLAUCOPIS POLYMENA. Plate XXVI. fig. 1. ORDER: Lepidoptera. SECTION: Crepuscularia? FAMILY: Zygænidæ, _Leach_. GENUS. GLAUCOPIS, _Fabr._ Sphinx, _Linn. Drury_. GLAUCOPIS POLYMENA. Nigra, alis maculis luteis, anticis tribus, posticis duabus; abdomine cingulis coccineis. (Expans. Alar. fere 2 unc.) SYN. Sphinx Polymena, _Linn. Syst. Nat._ 2. 806. _No._ 40. _Cram. Ins. t._ 13. _f._ D. Zygæna Polymena, _Fabr. Ent. Syst._ III. 1. _p._ 396. _No._ 34. _Gmel. Linn. S. N._ 2394. 40. (Sphinx.) HABITAT: China. _Upper Side._ Antennæ black and pectinated, being smallest at their extremities; between them is a white round spot placed on the front of the head; above them, on the neck, is a round spot of bright scarlet. Thorax black. The first segment of the abdomen scarlet; the two next are black, verged on their lower edges with a beautiful sky blue colour; behind this the abdomen is of a fine vermilion, separated by two small black lines, the extremity being black. Anterior wings dark brown, having next the shoulders a small spot of shining blue, and three spots of a deep yellow; the two largest of which appear as if divided by the tendons, which are black and run across them. Posterior wings dark brown, with two deep yellow spots; the smaller one near the shoulders, the other near the middle.