I am unable to ascertain to which of the modern genera of Noctuidæ, this and the following species are referrible. {19}NOCTUA UNDULARIS. Plate IX. fig. 4. ORDER: Lepidoptera. SECTION: Nocturna. FAMILY: Noctuidæ, _Steph._ GENUS. NOCTUA, _Auct._ NOCTUA UNDULARIS. Alis subdentatis nigricantibus, strigis transversis undulatis circiter 8. (Expans. Alar. 2 unc.) SYN. Phalæna (Noctua) undularis, _Drury, App. vol._ 2. HABITAT: New York. _Upper Side._ The antennæ are brown and thread-like. The head, body, abdomen, and wings are of a very dark brown, bordering on black, and appear somewhat glossy. All the wings are a little dentated, and on the anterior ones, from the base to the extremity, is a series of black indented lines or bars, whereof the last or outer one is strong and conspicuous, crossing the wing from the anterior to the posterior edges, about a quarter of an inch from the external margin. The posterior wings are marked exactly like the superior. _Under Side._ Is of a lighter colour, with the same kind of markings, but fainter. PLATE X. [Illustration] NYMPHALIS FERONIA. Plate X. fig. 1. 2. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Nymphalidæ. _Swains._ GENUS. NYMPHALIS, _Latr._ Papilio (Nymphales Gemmati), _Linn._ Papilio Satyrus, _Fabr. (Ent. Syst.)_. NYMPHALIS FERONIA. Alis subdentatis, supra coeruleo, fusco et albo marmoratis, omnibus ocellis sex iride simplici. (Expans. Alar. 3 unc. 6 lin.) SYN. Papilio (Nymph. Gemm.) Feronia, _Linn. Syst. Nat._ 2. 770. _No._ 140. _Fabr. Ent. Syst._ III. 1. _p._ 226. _No._ 710. _Cramer, pl._ 192. _fig._ E. F. _Herbst. Pap. tab._ 225. _fig._ 1. 2. _Latr. et God. Encycl. Méth. p._ 428. (Nymphalis F.). HABITAT: Surinam (_Drury_). India (_Linn. Fabr. incorrectly_).