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Show 438 INSECTA. preceding tribe. The mandibles arc concealed, edentate, and alik T . . e in both sexes. he mentum 1s almost triangular, and complrtel conceals the ligula, as well as the base of the maxillre. The bo/ is thick and convex above, almost cylindrical and rounded exterior!; The thorax is truncated and excavated before. The head of the males is furnished with a horn. SINODENDRON, Fab. Antenna! club formed by the three last joints(1). Those which have a thick, convex, ovoid body; mandibles forming a compressed and vertically projecting forceps in the males; a head much narrower than the thorax measured in its greatest width; and the tibire, at least the two anterior ones, br·oad and in the form of a reversed tr·iangle, form two subgenera, viz. ..lE.sALus, Fab. Where the mandibles, even in the males, are shorter than the head, and terminated posteriorly in the manner of a horn; the mentum conceals the maxillre; the ligula is very small; the body short and arched; the head almost entirely received into the emargination o£ the thorax; the tibire are compressed and triangular, and the sternum simple or without any projection(2). LAMPRIMA, Lat. Where the body is more elongated; the mandihles much longer than the head, in the males laminiform, vertical, angular, much dentated and pilose on the inner side; the maxillare exposed down to the base; the ligula very distinct; the labrum elongated; the two anterior tibire widened, and offering in the males a palette (spur)in the form of a reversed triangle, and a sternal point(3). Two other subgenera established by M. Mac Leay, Jun. approxi· mate to Lamprima in their prolonged mesosternum, projecting, however, less than in the preceding ones, in the head, which is much narrower than the thorax, and finally in their mandibles, the inner side of which is furnished with down; but their body is flattened or but slightly elevated, particularly in the females. The labrum is concealed, the anterior tibire are narrow and without a palette. The pal pi and lobes of the ligula are more elongated. (1) Scarabreus cylindricus, L.; Oliv., Col., J, 3, ix, 88. It is the only specief known, the remaining Sinodendrons of Fabricius belonging to other genera. (2) JEsalus scarabteoides, Fab.; Panz., Faun. Insect. Germ, XXVI, 15, 16. f (3) Lat. Gener. Crust. et Insect., II, p. 132; Letltrus teneus, Fab.; Schreib. , Lin. Trans., VI, 1. See also Mac Leay, Hor. Entom., I, 99. COLEOPTERA. 439 RvssoNoTus, Mac L. The mandibles of the males, as in Lam prima, forming a vertically compressed, angular and dentated forceps( 1 ). p11011DoTus, Mac L.-Chalcimon, Dalm.-Lamprima, Schrenh. Where the mandibles in the same sex are very long, narrow, arcuated, terminated in a hook curved downwards and securiform . on the inner side. The club of the antennre formed by the three last joints is less pectinated than in the others, and almost perfoliaceous. The mentum covers the maxillre(2). In the following subgenera the mesosternum does not project. The head is as wide as the thorax or (in various males) wider. The mandibles are glabrous or at least without a thick down on the inner side. The body is always flattened. Here, the eyes are not cut transversely by the margin of the head; the maxillre are terminated by a very slender penicilliform lobe without corneous teeth. LuoANus, Lin. The digestive canal of the true Lucani is much less elongated than that of the Scarabreides, but the esophagus is much longer. The male organs of generation also differ greatly from those of the preceding Insects, the testes being formed by the circumvolutions of a spermatic vessel, and not by an agglomeration of seminal capsules. The adipose tissue, which almost disappears in the Scarabreides, is here abundant and disposed in clusters, which converge to the median line. The larva of the L. cervus, which inhabits the interior of the Oak for sever·al years previous to its final metamorphosis, is considered as the Cossus of the Romans, or that verminiform animal which they regarded as a delicious article of food. L. ce1·vus, L.; Oliv., Col., I, i, 1; Rres., Insect. II; Scarab., I, iv, v. The male two inches in length, and larger than the fem; le; black, with brown elytra; head wider than the body; mandibles very large, arcuatcd, with three very stout teeth; two of (1) Lucanus nebulosus, Kirb., Lin. Trans., XU, xxi, 12; Mac L., Hor. Entom., I, p. 98. (2) Lamprima llumboldii, Scha:nh.; Chalcimon Humboldii, Dalm., Ephem. Entom., I, p. 3; Pholidotus lepidosus, Mac L., Hor. Entom., I, P· 97, the male; CauignetU8 geotrupoides, ejusd., the female. |
