OCR Text |
Show 506 INSECTA. and from the following subgenus in the antenn~, which twelve joints( I). In consistor SYBINES We find but eleven, seven of which are anterior to the 1 b( ) Those are deprived of wings. Such is the subgenus c u 2 • MYORHINus, Schrenh.-.8psis, Germ. To which we will unite the genera Tanyrltyncltus o z h' ' iJO enor 'nul Stypltlus, Trac!todes-Oomaainus, Dej.-of Schrenherr. ' We now pass to those which have but nine or ten joints in the antenn~, and possess the faculty of leaping. CloNus, Clairv. The Cioni do not leap, and they have nine or ten J. oints in th · Th 0 b 0 etr antenn~. e1r ody 1s usually very short and almost glob 1 S 1 f u ar. evera o them, together with their larv~, live on the Verbascum and Scro ularia(3). ~ext come those in which the posterior thighs are very stout, which ena~les them to lea~. The antenn~ consist of eleven joints. The body 1s short and ovo1do-conical. Those, whose antenn~ are inserted into the proboscis, form the subgenus 0ROHESTEs, Illig.-Salius, Germ.( 4) Those in which they originate between the eyes, that of RHAMPHus, Clairv.(5) In the last Rhynch~ni of which we have to speak, the legs are remote at base, and the sternum frequently presents a cavity of more or less extent, which receives the proboscis, and even frequently the antenn~. (1} The genera Heilipua, Ortlwrltinua, Paramecopa, Piaaodea, Peneatea, Erirhi· n~8, .!l.ntlwnomua, Euderea, Derelomua, Coryaaomerua, .O.ccalopi3tua, End<eUB, Ty· ch~ua, Sternechua, and Tylomua of the same. (2) ~he genera. Sybinea, Microtogua-a subgenus of Tychius, the genus Ellacw, DeJ.-Bradybatua (Rhinodea, Dej.). ( 3) The genera Cionua, Mecinua, Gymnr:etron Scha:nh. in which the antennz consist of ten joints; the genus Nanodea of the s~me, and ;hat of Prionopm, Dal· man, where there are nine. See Oliv., Col., V, p. 106. ( 4) Oliv., Ibid, p. 87. (5} Oliv., Ibid, p. 39. COLJ<:OPTERA. 507 Those, in which it does not exist, inay form two subgenera, viz. that of AMERiUNUS, Where the body is oval or almost cylindrical and convex beneath( 1 ); and that of BARIDius, ' · Where it is depressed and rhomboidal(2). Those Rhynch~ni of l'"abricius, in which the sternum presents a cavity for the reception of the proboscis, have been arranged by M. Schrenherr in a great many genera, which we will reduce in the following manner. They are either winged or apterous. Of the former, some are almost rhomboidal, with the thorax abruptlynarrowed in the manner of a tube near its anterior extremity; the abdomen is almost triangular. They are connec.ted with the Baridii. Here the antenn~ are composed of twelve joints. CAMPTORHYNOHus-EurMnus, Schrenh. The Camptorhynchi are distinguished from all the following sub· genera by their antenn~, which, from the bend, form a thick, per· foliate club(3). CENTRINUS, Where the scutellum is distinct and the abdomen completely covered by the elytra, the eyes are remote, and the club of the antenn~ is elongated. There is frequently a tooth or horn on each side of the cavity of the pectus( 4 ). ZYGOPS· Where the eyes are very remarkable, being extremely large and closely approximated or united superiorly, as well as the generally long legs, of which the posterior at least are very remote( 5). (1) The genera .O.merhinm, Netarhinua, .!J.lcidea, Solenopus, of Scha:nherr. (2) The genera Rhinaatua, Cholua, Dionycltus, Platyonyx, Madarua, Baridiu6. (3) M. Kirby having ah·eady applied the name of Eurhinus to another genus of this family, it became necessary to change the denomination of this one. 4) See Scha:nherr. (S) llis genera Zygop8, Mecopua, Lechriops. |