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Show 304 INSEC1'.A, Most of them frequent the shores of rivers, or other aquatic locaJi. ties. We divide the Patellimani into those in which the head becomes insensibly narrowed behind, or at base, and those where this contrac. tion occurs suddenly behind the eyes in such a manner that the head seems to be supported by a kind of neck or pedicle. The first also may be subdivided into two. Some, in which the mandibles always terminate in a point, and the palette of whose tarsi is always narrow, elongated, and form. ed by the three first joints, the second and third square, have the labrum entire or nearly unemarginate, and one or two teeth in the emargination of the mentum; the anterior extremity of the head has no border. Here, as in the preceding ones, the under part of the palettes of the tarsi present two longitudinal series of papillre or hairs, with an intermediate space, and not a compact and continuous brush. The exterior pal pi are always filiform and terminated by an almost cylindrical or ovoido-cylindrical joint. Sometimes the body is strongly flattened. DouaHus, Bon. The Dolichi approach the last subgenera, and are removed from all the others by the hooks of their tarsi, which are dentated beneath. Their thorax is cordiform and truncated( 1 ). PLATYNus, Bon. Similar to Dolichus in the form of the thorax, but the tarsial crotchets are simple. The wings are absent in some, or are imperfect(2). AGoNuM, Bon. Where the thorax is almost orbicular(3). Sometimes the body is of an ordinary thickness, the thorax being always in the form of a truncated heart. ( 1) Carabus flavicornis, Fab.; Preys!., Bohem. Insect., I, iii, 6, and some other species of the Cape of Good Hope. (2) Platynus complanatus, Bon.;-Carabus angusticollis, Fab.; Pnnz. Faun. In· sect. Germ., LXXITI, 9;-Platynus blandus, Germ., Insect. Spec. Nov., I, p. 12~ Oarabus scrobiculatus, Fab.;-Harpaluslivens, Gyll. · American species; Plat. erytltropus, Dej. ;-P. angustatus, I d. Species ID, P· 97-99 . .O.m. Ed. (3) Barpalus viduus, Gyll.: Panz., lb., XXXVII, 18;-0arahUI margiruzttu, 'FAb.; Panz., lb. XXX, 14 ;-Carab. 6-punctatus, Fab.; Panz. lb. XXX, 13, and COLEOPTERA. 305 ANaHOMENus, Bon. ( 1) There, the inferior surface of the tarsial palette is furnished with a compact and continuous bru:h· T~e exterior pal pi? those of_ the labium in particular, are termmated In several by a thtckcr or w1der 'oint in the form of a reversed triangle. J We will commence with those in which they at•e filiform. CALLISTus, Bon. The tooth in the emargination of the mentum entire; exterior palpi terminated by an oval joint pointed at the end; thorax in the form of a truncated heart(2). OonEs, Bon. Similar to Callistus in the tooth of the emargination of the mentum, but the last joint of the external maxillary pal pi is cylindrical, while that of those attached to the labium forms a truncated oval. The thorax is trapezoidal, narrower before, and as wide posteriorly as the base of the abdomen( 3). CHLlENius, Bon. Tooth of the emargination of the mentum bifid; exterior maxillary palpi terminated by an almost cylindrical joint, somewhat XXXVIII, 17?-C. parum·punctatus, Fab.; Panz., lb. XCII, 4;-C. 4-punctatua, Fab.; Oliv., Col. III, 35, xiii, 158. See Catalogue, Dej., who has formed a new genus of the ./1. rotundatum, and some others. . . The genus, here alluded to by our author, is the OLIBTRoPus, DeJ., who, wh1le he seems strongly inclined to form but one section of Agonum and Anchomenus, from the occasional, almost total, obliteration of the distinguishing characters of each, so that in some cases it is hardly possible to say whether an Insect should be referred to the first or the second, has deemed it necessary to separate the above species, which differ from Agonum in several essential c?ara~ters, and principally in the absence of the tooth of the middle of the emargmatlon of the mentum. See his Species, &c., III, p. 176, and add of American species of Ago· num the ./1. octopunctatum (F6ronia octopunctata, Say), cupripenne, nitidulum, mo· rOIUm,femoratum, melanarium, &c., &c. .O.m. Ed. (1) Oarabua prasinua, Fab.; Panz., lb., XVI, 6;-C. albipes, Fab.; P~nz., lb. LX~ill, 7;-C. oblongua, Fab.; Panz., lb. XXXIV, 3. [Add f~r ~mer1can ~pecies, the Anch., gagates, sinuatua, corvinus, elongatulua, extenS?.collta, thor(lCI.CUB, &c., &c. .11m. Ed.] (2) Oarabualuneatua, }'ab.; Panz. Faun. Insect. Germ. XVT, 5; Dej Spec. 11, p. 296. (3) Carabull ltelopioides, Fab.; Panz ., Ib ., XXX, ii. See Dej. S pee. II, P· 37 4. Vot. lll.-2 0 |