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Show 436 INSECTA. edge is more ot· less emarginated in the middle. The terminal lobe of the maxillre is silky or penicilliform. The body is almost ovoid and depressed. ' This diviston comprises the genus CETONIA, Fab., With the exception of the species that belong to the preceding subgenus and to Rutela(l). In some, the thorax is prolonged posteriorly in the form of an an. gle, so that the scutellum totally disappears. They form the genus Gymnetis, Mac Leay, Hor. En tom., I, p. 152. Several are found in America. Some inhabit Java, and the eastern parts of Asia, in which the thorax is similarly prolonged, but where the scutellum, although very small, is still visible(2); the mentum is also more deeply and angularly emarginated, and the last joint of the labial palpi is proportionally longer. The epistoma is more or less bifid. There are others in New Holland and the East Indies in which the epistoma is still bifid or armed with two horns in the males, but the body is proportionally nurower and more elongated, the abdomen considerably narrowed posteriorly, even almost triangular, and the antennal club considerably elongated-they compose the genus Ma. cronota of Wiedemann. These sections howevet· can only be con· sidered as established, when the numerous species of the genus Cetonia of Fabricius have been particularly studied. Those of Europe are provided with a scutellum of an ordinary size. Such are the C. aurata; Scarabreusauratus, L.; Oliv., Col., I, 6, i, i. Nine lines in length; a brilliant golden-green above, cupreous-red beneath; white spots on the elytra. Common on flowers and frequently on those of the Rose and Elder. C. fastuosa, Fab.; Panz., Faun. Insect. Germ., XLI, 16. Larger than the aurata; immaculate, uniform, golden.green; tarsi bluish. South f France. G. stictica; Scarab. sticticus, L.; Panz., lb., I, 4. Five lines in length; black, somewhat pilose, ·with white points; those on the ventet' arranged in two or three lines, according to the sex. Very common on Thistles(3). which bas the air of a Trichius, but the axillary pieces and sternal prolongation of the Cetoni~. Certain species of this last genus-C. cornuta, Fab.-have the thorax furnished with a small horn, and at the first glance resemble Scarabai ( 1) Lat. Genet'. Crust. et Insect. (2) C. chinenm, Fab.;-C. regia, J:.'ab. ;-C. palma, and imperialis, ScbCI!nherr. (3) See the first division of the Cetoni~ of Olivier; Latr., Gener. Crust. et In· COLEOPTERA. 437 In the second tribe of the Lamellicornes or the LucANIDEs, so called from the genus Lucanus of Linnreus, the antennal club is composed of leaflets or teeth arranged perpendicularly to its axis in the manner of a comb. These organs always consist of ten joints, the first of which is usually much the longest. The mandibles are always corneous, most commonly salient and larger, and even very different in the males. The maxillro, in most of them, are terminated by a narrow, elongated · and silky lobe; those of others are entirely corneous and dentated. The ligula in the greater number is formed of two small silky pencils projecting more or less beyond a'n almost semi-circular or square mentum. The anterior legs are most frequently elongated, and their tibire dentated along the whole of the outer side. The tarsi terminate by two equal and simple hooks with a little appendage terminated by two setre between them. The elytra cover the whole of the abdomen above. We will divide it into two sections, corresponding to the genera Lucanus and Passalus of Olivier. · In the first we find the antennre strongly geniculate, glabrous or but slightly pilose; the labrum very small or confounded with the epistoma; maxillre terminated by a membranous or coriaceousj very silky, penicilliform lobe. without teeth, or at most with but one; and a ligula either entirely concealed or incorporated with the mentum, or divided into two narrow, elongated, silky lobes extending more or less beyond the mentum. The scutellum is situated between the elytra. The first section will form the genus LucANUS. We will make a first division with those in which the antenna} club consists of but from three to four joints or leaflets. We will begin with Insects~ which, with the exception of their antennre, are almost entirely similar to Oryctes, a subgenus of the sect., I, iii, p. 126; Schcenh., Synon., I, iii, p. 112, and Lin. Trans., XIV, with respect to the genera, Genuchus, Scltizorhina, and Gnatlwcera, established at the expense of that of Cetoni,a. |