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Show 278 l1 SECTA. differs from the latter in its tarsi, the hooks of which are simple. The body also is flattened, as in the preceding and other neighbour. ing subgenera, tolerably broad, with filiform palpi, unidentated mentum and transverse labrum; the thorax is wider than the head and nearI y semi-orbicular. ' But one species is known. The other Carabici of the same division with equally simple hooks are removed from the preceding by the form of theit• head, which is suddenly narrowed immediately after its origin, presenting the appearance of a neck or rotula. · First come those in which the tarsi of both sexes are identical, sub-cylindrical or linear, and whose penultimate joint, at most,is deeply notched or bilobate. Sometimes the exterior palpi are filiform or but slightly enlarged at the end, with the last joint verging to an oval; the head has the same form and becomes gradually narrowed behind the eyes. The first joint of the antennre is always short or but slightly elongated. The thorax is always narrow and elongated. The body is thick. The emal'gination of the mentum has a central tooth. The ligulais almost square, and its paraglossre are salient and pointed. CAsNONIA, Lat.-Ophioncea, Kliig. The thorax almost like a truncated cone, or a cylinder narrowed · anteriorly( 1 ). LEPTOTRAOHELus, Lat. Thorax cylindrical, and without any sensible contraction ante· riorly; elytra entire or not truncated; penultimate joint of the tarsi bilobate(2). 0DACANTHA, Payk. Fab. The same kind of thorax, but the elytra are truncated and the joints of the tarsi entire. Odac. melanura, Fab.; Clairv., Entom. Helv. II, v; Hist.Nat. des Coleop. d'Eur., II, x, 6. The type of the genus; three lines (1) See Entom. Brasil., of Kliig; the Spec. Gener., of Dej., I, p. 170; Hist Nat. des Coleop. d'Eur., fascic. II, vii, 6. The species figured-C. cymwccphalafrom the penultimate joint of the tarsi forms a particular division. It is found in Bengal. All the others, the principal of which is the .Jlttelabus pensylvanieu~, L., belong to America and have all the joints of the tarsi entire. American species, C. pensylvanica, rofipea. .11m. Ed. ( 2) Odacantha dar sa lis, }'ab. COT~EOPTERA. 279 in length; greenish-blue; elytra, the extremities excepted, russet ·yellow; base of the antennre, pectus, and a greater portion of the feet of the same colour; ends of the elytra blackish-blue. It frequents the neighbourhood of water, and is more particularly found in the north of France, Germany and Sweden( 1 ). Sometimes the exterior palpi are terminated by a thicker triangular joint, or one resembling a reversed -cone; the head, directly behind the eyes, is suddenly narrowed, and has a triangular form, or that of a heart. Some, in which the body is flattened, placed by Fabricius among bis Galeritre, have all the joints of the tarsi entire, the thorax cordate and posteriorly truncated, and the mandibles as well as the maxillre of an ordinary length or but slightly salient. The fit·st joint of the antennre forms a reversed and elongated cone. The ligula is square, and its paraglossre are usually as long as itself; the middle of the emargination of the mentum is furnished with a tooth. These Carabici, of which the species indigenous to Europe are found under stones, bark, and most commonly in the vicinity of water, form the three following subgenera. ZuPHIUM, Lat. First joint of the antennre at least as long as the head; exterior maxillary palpi much elongated(2). PoLISTIOHus, Bon. First joint of the antennre, as in the following subgenus, shorter than the head; maxillary palpi of the ordinary length; second, third and fourth joints of the tarsi, those of the two anterior legs particu· larly, short and nearly orbicular; the ligula terminated superiorly by a straight margin, its paraglos3Ge salient, and resembling narrow, arcuated and pointed auriculre(3). HELLuo, Bon. . This subgenus is only distinguished from Polistichus by the en· tlrely corneous ligula, which is rounded at the superior extremity, (l) The Odacantlta tripustulata, Fab., is a species ofNotoxus. 1 (2) dGalerita olens, Fab.; Clairv. Entom. Helv. II, xvii, A, a; Hist. Nat. des Vo· eop. 'Eur., fasc. II, x, 3. (3)'Galerit fi · l 4 . p 1' • a ascto ata, Fab.; Clairv., lb., B, b; Hist. Nat. des Coleop. d'Eur., lb., ,- 0 18tlcltua diacoideua, lb. 5. See the Spec. des Coleop., Dej. I, p. 194. |