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Show 416 INSECTA. posteriol'ly on the head; front of the thorax cut obliquely, with three teeth or tubercles on the elevated portion posterior to the section; elytt·a smooth. Found, together with its larva, in tan. 0. silenus; G. silenus, Fab.; Oliv., Col., I, s, viii, 62, a-c. Smaller· than the nasicot·nis; of a lighter but similar hue; a little recurvcd and pointed horn on the head of the male; a deep ex· cavation in the middle of the thorax; the last joint of the two anter·ior tarsi inflated, and with two very unequal hooks; elytr·a finely and irTegularly punctured(l). In AGAOEPIIALA, Manh. The anterior legs, at least in the males, at·e longer than the sue· ceeding ones, and the four postel'ior tibire are slender or not thick, almost cylin<h·ical, slightly dilated at the extremity, and without deep lateral incisures or emar·ginations. The labrum is entirely concealed. The terminal lobe of the mat· illre is simply pilose. The antennre consist of ten joints; the suppu· tation of their number in the Encyc. Method., article Scat·abees, which amounts to but nine, is enoneous. I know two species, both ft·om Brazil(2). Sometimes the rnaxillre, usually corneous or scaly, are more or less dentated. In SoARABJEus proper,-Geotrupes, Fab. The body is thick and convex, and the outer side of the mandibles sinuous or dentated. The equatorial countries of both hemispheres produce very remarkable species of this subgenus. S. Hercules, L; Oliv., Col. I, 3, 1, xxiii, 1. Five inches long; black; elytra greenish-grey mottled with black; a re· curved and dentated hom on the head of the male, and a second one, long, projecting and pilose beneath, with a tooth on each (1) Acid the Geotrupes,boas, rhinocerus, stent()r, &c. of Fabricius. The genus Orplmus, 'Mac Leay, established on the G. bicolor of Fabricius does not difrcr from the preceding. The anterior margin of the labrum is sali;nt or exposed. The maxilla: are terminated by a bundle of spinuliform cilia, arcuated outwards, with a Cl'Ustaccous triangular lobe. The antenna! club is nearly globu· lar. His genus Dasygnathus, placed by him in his family of the Dynastides, i1 unknown to us, but we presume, from the description of its characten, that it ap· pronchcs the preceding and following genus. (2) The .!Egeon ofl•'abricius is perhaps congene•·ie. COLEOPTERA. 417 side on the thorax. South America. Some travellers call it the Mou~he cornue( 1 ). S. c(iclwtomus, Oliv ., lb. X VII, 156. A fine maronne-hrown; a large bifurcated horn with cleft branches on the head; a second one, smaller, curved and bifid at the end, on the thorax of the male. The East Indies. S.longimanua, L.; Oliv., ' lb. IV, 27. Fulvous-brown; head and thot·ax destitute of horns and tubercles; the two anterior legs more 1ha'n half as long again as the body, and arcuated. . The'East Indies. S. 'punctatus; Oliv., lb., VIII, 70. Black; punctured; no ~Ievation in the shape of a horn in either sex; the epistoma truncated anteriorly, and the angles of the section slightly raised. in the manner of teeth; two approximated tubercles on the middle of the head(2). The only species in France. · · PHILEunus, Lat.-Geotrupea, Fab. The Phileuri only differ from the Scarabrei in their mandibles, which are stt·aighter, destitute of sinus or teeth on the outer side, and in their depressed body, the thorax of which is dilated and rounded on the sides(3). Our second division contains Scat·abreides, closely allied to the preceding in some respects, but also closely approximating to various Melolonthre, and ,particularly to the Cetonire, which they resemble externally, but from which they differ in the arrangement ot' the mouth; Fabricius and Oli viet· even art·anged most of these Insects with them. Their body is generally shorter, more rounded, smoolher than that of the Scarabrei, and decorated with bl'illiant colours. The head and thorax are identical, and without any particular pro· jection in both sexes. The antet·ior margin of the l~brum is almost always exposed or apparent. The maxillre a're entirely scaly, as if truncated at the ~xtremity, and furnished on the inner side with five (1) This Apecies is the type of the genus Dynaatea, Ki1·by. The S . .!J.ctre&n forms another, that of .Megaaoma. See Lin. Trans., XIV. (2) The Geotrupes of Fabricius, with the exception of the precited species; forming the genus Oryctea, and of the following one. [We have several species of Ibis genus in the United States, nmong which should be particularly noticed the large and sple11did Sc. Tityus, the .IJ.ntmus, &c. .11m. Ed.] (J) G. dydfmus, vulgus, depreasus, Fab. Certain undescribed species from Brazil and Cayenne, somewhat analogous to Sinodendron, have a thicker body, and con· neet the Phileuri with our Scarab a! ides, or the Geotrupes of Fllbricius, a genus which has not been sufficiently studied with respect to the organization of the · parts of the mouth. Vot. 111.-3 C |
