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Show 342 INSECTA. GALBA, Lat. Mandibles terminating in a simple point; maxillre unilobulate· last joint of the palpi globular; the body almost cylindrical(!). ' EuoNEMis, Arh. Mandibles bifid; maxillre bilobate; last joint of the palpi near! securiform, and the body almost elliptical(2). y At other times the antenn::e, occasionally clavate, are received, at least partially, either into the longitudinal grooves of the lateral borders of the prc:esternum, or into fossulc:e situated under the pos· terior angles of the thorax. The tarsi are frequently provided with little palettes formed by the prolongation of the inferior pellets, or the penultimate joint is bifid. Some, with filiform antcnnc:e, have the joints of the tat•si entire and without palettes underneath; the anterior legs, when contracted, are received into lateral cavities in the inferior surface of the thorax. Such is the ADELOOERA, Lat.(3) Others, with antennc:e also of equal 'thickness throughout, have the joints of the tarsi entire, but the inferior pellets prolonged or projecting in the manner of little palettes or lobes. Their head is exposed. They form the LissoMus, Dalm.-Lissodes, Lat.--Drapetes, Meg. Dej.( 4). Others again have equally filiform antennre, but their second and third joints are flattened, larger than the following ones, and are ( 1) I have seen three species, all from Brazil. One of them has many points of resemblance to the Melasis tuberculata, Dalman-Anal. Entom. The maxilla: ter· minate in a very small and pointed lobe. (2) Count Mannerheim has published a splendid Monograph of this subgenus, an extract from which, with the plates, is found in the third volume of the An· nales des Sciences Naturelles, accompanied by some observations from myself on the too great extent given to the subgenus by that author. The species he calls the capucinus is in my opinion the only one that belongs to it, u.nd such was the original idea of him who established it. (3) Elater ovalis, Gel'm.;-Elater fuscus, Fab., and some others from the East Indies, collected there by l\1. de Labillardiere. (4) .Ualm., Ephem. Entom., 1824·. His Lissomus punctulatus is closely allied to the Drapetes castaneus of Count Dejean, and the Elater lcnvigalus of I<'abricius. One species of this subgenus is found in Europe, the Elater equcstris, Fab.; Panz., Faun. Insect. Germ., XXXI, 21. N. B Messrs Lepelletier and Set·ville-Encyclop. Method., Jnsect., X, 594-hal'e t:OLE.OPTEUA. 343 lone received into the sternal grooves; the tarsi are similar to those a • 1 of Lissomus; the head IS concea ed underneath, and as if covered by a semicircular thorax, into which it is plunged. Such is the CnELONARIUM, Fab. The antennre, when at rest, extend parallel to each other along the pectus; the first and the fourth joint are the smallest of all; the seven following ones are of the same size, and, with the exception of the last, which is ovoid, almost in the form of a reversed cone, and equal. The body is ovoid, and the anterior tibire are wider than the others. All the species known are from South A me rica( 1 ). The last subgenus of this first division, or Tnnosous, Lat.-Trixagus, Kugl. Gyll.-Elater, Lin. Is distinguished from all others of this tribe by the antennre, which terminate in a triarticuJatccl club, and are lodged in a lateral and inferior cavity of the thorax. The penultimate joint of the tarsi is bifid, and the point of the mandibles entire(2). Our second division of this tribe will include all the El~terides whose antennre are exterior or exposed. We will separate, in the first place, those in which the last joint of the pal pi, of the maxillaries particularly, is much larger than the preceding ones, and almost securiform. A single subgenus, the fonned a little group, with various species of Elater, composed of three genera, and characterized by the presence of the elongated and lobe-like pellets with which the inferiot· surface of the four first joints of the tarsi are furnished. The first of these genera, LrssonE, or the Lrssol\rus, Dalm., is distinguished from the two others by the antenna: which ure closely approximated at base; in the others they are remote. Those of the genus T.E·rn.nonus arc fiabclliform in the males. In the third or PERICALLus, they are simply serrated in both sexes. The Elater jlahellicomis, }'ab., belongs to the first, and consequently this genus is a division of that which I have named HEMIRUIPus. The Elaterides ligneus, suturalis, furcaiUJ, &.c., Fab., belong to Pericallus, which will then comprise all the species of my CTENicEnA, whose tarsi present the general character above mentioned. (1) Fab., Syst. Eleut., I, 101; Lat., Gencr. Crust. et Insect., I, viii, 7, and II, 44; Dalm., Ephem. Entom., 1824, p. 29. [This genus is also found in the southern section of North America, where however it is v~ry rare. The S. Lecontei, Dej ., now in my cabinet, is perhaps the only specimen known in the United States. Arn.Ed.] (2) Elater dermestoides, L.; E. clavicornis, Oliv., Coli. II, 31, VIII, 85, a, h; Der- 17\Ulesadstrictor, Fab.; Panz., Faun. Insect. Germ. LXXV, 15. Its larva inhabits oak wood. |