This species breeds twice in the year, namely in June and September. The caterpillar, according to Abbot, feeds on the plane-tree (Platanus occidentalis Linn.), oak, liquidambar, and pine trees. Some of them are of a tawny colour, others tawny and orange, others green. They are furnished with long rigid hairs, and the second and third segments of the body are also armed with two pair of short, erect, rugose horns. {18}This insect is placed by Mr. Kirby in his new genus Cerocampa, together with Phalæna regalis, Fabr. Mr. Kirby had, however, evidently in view the caterpillars of the latter insect, when he proposed this generic name, and which are armed with numerous, long, erect, rigid spines, those near the head being curved, and giving the insect somewhat the appearance of a cockatoo. This larva is figured by Abbot and Smith, pl. 61, and specimens, admirably preserved by Abbot, are contained in the collection of the Entomological Society of London, presented by Mr. Kirby. There is also considerable difference between the chrysalides of these two insects, that of imperialis being more elongate, with a bifid tail, and with transverse rows of short abdominal spines, of which the chrysalis of regalis is destitute. One of the caterpillars observed by Abbot, went into the ground on the 16th of September, and the moth came out on the 4th of July. They are extremely difficult to rear in confinement. NOCTUA SQUAMULARIS. Plate IX. fig. 3. ORDER: Lepidoptera. SECTION: Nocturna. FAMILY: Noctuidæ, _Steph._ GENUS. NOCTUA, _Auct._ NOCTUA SQUAMULARIS. Alis cinereis, anticis fasciâ irregulari centrali ferrugineâ, lineis duabus externè cinctâ, posticis fasciis duabus obscuris. (Expans. Alar. 1 unc. 9 lin.) SYN. Phalæna (Noctua) Squamularis, _Drury, Append. v._ 2. HABITAT: New York; taken on the 11th day of May. _Upper Side._ The antennæ are brown, like fine threads. The tegulæ of a pearl colour, standing up as if projecting from the back. The colours on the anterior wings are divided by a strong bar of a deep chocolate, running cross the wings near the middle, from the anterior to the posterior edges. This softens into a deep slate colour, covering that part of the wings down to the external edges. The part next the shoulders is of a light ash or pearl colour, whereon are two small black spots or stripes, situated near the anterior edge. On the dark part near the lower corner, run two small black irregular lines, from the posterior edge; one running cross the wing, the other only half across. The posterior wings are of a lightish brown, having two bars of a deep brown (almost black) rising from the abdominal edge, and crossing the wing upward, grow broader and fainter as they approach the middle and anterior edge. _Under Side._ Is of a faint russet colour, having little or no marking thereon. All the wings are slightly dentated.