| OCR Text |
Show 332 INSECTA. STENus, Lat. The antennre inserted near the internal margin of thee es termm• ate d m• a tri•a rti·c u 1a te d c 1u b ; extremi•t y o f the mandiblYes 'f oarnkd. ed; large eyes. 8. 2-guttatus; Staphylinus 2-guttatus, L.; Panz Faun I • · nsect Germ., XI, 18. About two lines in length; all black, with~ reddish dot on each elytron( 1 ). The third section-DENTIORURA, Lat.-differs from the second· the maxillary palpi, which are much shorter than the head, and \~ ways consist of four distinct joints; the anterior tibire, at least, a:e dentated or spinous along their exterior side. The last joint ofth tarsi, which in most of them are bent under the tibire, is as long a: all the preceding ones together, or longer; the first, or two first, are usually so small or so concealed that the whole number does not ap· pear to exceed two or three. The fore· part of the head, and even the thorax, is armed with horns in several males. The antennre are inserted before the eyes. Some, whose palpi have a fusiform termination, whose antennre are mostly granose. a~d ~r~dua~ly enlarge towards the extremity, present but three d1stmct JOints m the tarsi(2). OxYTELUs, Grav.(3) The othet·s have filiform palpi, and at least fout• very distinct joints in the tarsi. OsoH.IUs, Leach, Dej. The body cylindrical; all the tibire widened and dentated· the bead as long as it is wide; thorax almost cordiform, narrowe/ and trun· cated ~osteriorly; the greater pat•t of the antennre granose, insensibly enlargmg towards the extremity, and shorter than the head and tho· rax; mandibles much shorter than the head, crossing considerably, and terminating in a simple point; mentum large and scutiform. (1) Add Staphylinua Juno, Payk. ;-P~derua proboacideua, Oliv., CDl. III, 44, I, 5;-Stap!t .. clavicurnis, Panz., Faun. Insect. Germ. XXVII, 2. See Gravenhors4 Co1eop. Mtcrop.; Lat., Gener. Crust. et Insect., genus Stenua, and Gyll., Ibid. p. 463. · (2) With the exception of the Tachini the anterior tarsi are no longer re· markab1y dilated. ' (3) See Encyc. Method., article 0XYTELE; the Monog. cit. of Gravenhorst, and the Insect. Suec., Gyll ., I, pars II, p. 444. COLEOPTERA. 333 But a small number of species are known, which are not yet described. From Guiana and Brazil. ZYROPHORUS, Dalm.-Leptochirus, Germ.-lrenreus, Leach.-Oxytelus, Oliv.-Piestus, Grav. The body depressed; anterior legs only, wider than the rest, dentated exteriorly; head transverse; thorax square; antennre equal throughout, at least as long as the head and thorax, and composed mostly of oval or cylindrical joints rounded at both end5; mandibles as long as the head, and dentated at the extremity( 1 ). PRoGNATHA, Lat. Bloncl.-Siagonum, Kirby. The Prognathre scarcely differ from the Zyrophori except in their filiform antennre, composed of elongated joints(2). CoPROPHILus, Lat.-Omalium, Grav. Oliv. Gyll. The body still flattened, but all the tibire dentated or spinous exteriol'ly; antennre much longer than the head, granose, insensibly enlarging towards the end; mandibles almost lunate, arcuated exteriorly, not sensibly dentated, and their extremity but slightly prolonged( 3). In the fourth section, that of the DEPRESSA, we find a free head, an entire labrum, and short maxillary palpi of four distinct joints; but the tibire are simple, or without teeth or spines exteriorly, and the tarsi evidently consist of five joints. Here the palpi are filiform. 0MALIUM, Gra v. Th~ thorax as wide as the elvtra, wider than the head, and almost forming a transverse square; . the angles, or at least those before, rounded, and frequently with a raised lateral margin; the antennre enlarging towards their extremity(4). · LESTEVA, Lat.-.!lnt!tophagus, Grav. Thorax cordiform, narrowed, and truncated posteriorly, almost (1) See Dalman, Anal. Entom. p. 23; his Z. fronticornis, IV, f. 1, appears to he the Oxytelus bicornis, Oliv., Encyc. Method. The one he calls penicillatua, lb. f. 2, appears to be closely allied to the Pieatua sulcatus, Gravenhorst. The Leptochirua, lroriaceua, Germ., Insect. Spec. Nov. I, 1, is a very distinct species. (2) Siagonum quadricorne, Kirby and Spence, lntrod. to Entom., I, 1, 5; Blonde~ Ann. des Sc. Nat. Avrill817, XVII, 14-17. (3) Omalium rugosum, Gravenhorst, and other species with short e1ytra. (4) See Gravenhorst, Encyc. Method., art. Omalie, and Gyll., lb., P· 198. |
