This species seems nearly allied to the moths, which English collectors call the Thorns, and to which Stephens restricts the name of Geometra, but which M. Duponchel terms Ennomos. BUPALUS CATENARIUS. Plate VIII. fig. 3. ORDER: Lepidoptera. SECTION: Nocturna. FAMILY: Geometridæ, _Steph._ GENUS. BUPALUS, _Leach_. Fidonia, p. _Treitschke_. Phalæna (Geometra), _Drury_. BUPALUS CATENARIUS. Fronte fulvâ; alis albis lunulâ mediâ; anticis strigis duabus undatis (scil. ante et pone medium), posticis strigâ unicâ, nigris. (Expans. Alar. 1 unc. 9 lin.) SYN. Phalæna (Geometra) catenaria, _Drury, App. v._ 2. _Fabr. Ent. Syst._ III. 2. _p._ 140. _No._ 41. _Gmel. Linn. S. N._ 2461. 660. HABITAT: New York (_Drury_). "In Indiis" (_Fabr._). _Upper Side._ The head is orange-coloured; the eyes black; the antennæ are broad, and pectinated; the thorax white, with three spots of orange colour, one at each shoulder, the other at the base of the abdomen, where are two small black specks. The abdomen is white, and on each ring is a small black speck. The wings are white; and, on each anterior one, are two denticulated lines, running cross the wing, from the anterior to the interior edge, in a circular manner; the one near the base, the other {17}near the external edge, which last forms, on each nerve, a small black speck like an arrow head. Between the two lines is a black spot near the anterior edge. The posterior wings have a similar line running cross them, from the anterior to the interior edges, in a circular manner, and, meeting a little above the extremity of the abdomen, with a black spot in each near the middle. _Under Side._ Is similar to the upper, only the black spots are more conspicuous. PLATE IX. [Illustration] CERATOCAMPA IMPERIALIS. Plate IX. fig. 1. 2. ORDER: Lepidoptera. SECTION: Nocturna. FAMILY: Bombycidæ, _Steph._ GENUS. CERATOCAMPA, _Harris, Append. to Hitchcock's Geology of Massachusets_. Cerocampa, _Kirby & Spence, Ind. Introd. to Ent._ Odonestis, _Germar. Stephens._ Lasiocampa, _Latr. Schrank._ Bombyx, _Fabr._ CERATOCAMPA IMPERIALIS. Alis flavis, fusco irroratis et variegatis, omnibus infra maculâ discoidali subocellari fuscâ. (Expans. Alar. 4 unc. 9 lin. [male].--6 unc. [female].) SYN. Phalæna (Attacus) Imperialis, _Drury, App. v._ 2. Bombyx Imperialis, _Fabr. Ent. Syst._ III. 1. _p._ 435. No. 89. _Gmel. Lin._ S. N. 2417. 510. Phalæna Imperatoria, _Abbot and Smith, Ins. Georgia, tab._ 55. _Oliv. Enc. Méth._ 5. 56. 116. Bombyx Didyma, _Pal. Beauv. Ins. Lep. pl._ 20. HABITAT: New York (_Drury_). India (_Fabricius_).