of the wing within this is deep rusty brown, with a larger white spot in the middle, verged with black, and tinged behind with red brown. The colour below the red bar is deep rusty brown, the border along the external edge being of a dark dirty buff, whereon are two small dark lines, having an irregular indented line of the same dirty buff above them. The wings are entire. _Under Side._ The markings on all the wings are more distinct, and brighter than on the upper. The posterior wings, and the major part of the anterior, being covered with dust-like buff hairs, except the spots and buff margins round the edges. The posterior wings along the anterior edges being verged with white, which becomes broader as it approaches the shoulders. The caterpillar of this fine moth feeds upon the wild American plum (Prunus Pensylvanica), garden plum, &c. It is thick and fleshy, of a pale green colour, with a pair of small blue spots on each segment, and with two rows of short and setose yellow dorsal tubercles. One observed by Abbot, spun up on the 17th of June, and the moth came out on the 30th of March following. The cocoon is attached to a twig. The outside web is coarse, and the inner covered with silk, like a silk-worm's cocoon. Abbot states that this silk has been carded, spun, and made into stockings, and that it will wash like linen. The species is, however, too rare to be of any utility in Georgia. It is, however, much more abundant in the neighbourhood of New York, and has been bred in England from some brought over in the chrysalis state. It is difficult to rear it in confinement. SPILOSOMA ARGE. Plate XVIII. fig. 3. ORDER: Lepidoptera. SECTION: Nocturna. FAMILY: Arctiidæ, _Steph._ GENUS. SPILOSOMA, _Steph._ Arctia, _Latr._ Eyprepia, p. _Ochs._ Phalæna (Noctua), _Drury_. SPILOSOMA ARGE. Alis albidis, nigro-maculatis et lineatis, posticis incarnatis lineâ marginali fulvâ; abdomine concolori maculis nigris. (Expans. Alar. 1 unc. 9 lin.) SYN. Phalæna (Noctua) Arge, _Drury, App. v._ 2. _Oliv. Enc. Méth._ 5. 92. 232. Bombyx Dione, _Fabr. Ent. Syst._ III. 1. _p._ 442. _No._ 106. _Abbot and Smith, Ins. Georg. t._ 63. HABITAT: New York; taken on the 20th day of May. _Upper Side._ Antennæ filiform, and cream-coloured at the base, but black at their extremities. The tongue is small, and curled up. The neck red, having two small black streaks above it. The thorax and abdomen cream-coloured. On the former are three black streaks. On each annulus of the abdomen is a black spot, and another on each side. Anterior wings cream-coloured, with many black spots and marks thereon, of different forms and sizes, and varying very greatly in different specimens. The {34}anterior margin red. Posterior wings almost transparent, dirty cream-coloured, tinged with red, whereon are many oblong sooty spots. Ciliæ cream-coloured, within which is a narrow red line.