5 16 



IXSECTA. 



nearly equals half of tliat of the eiytra, soiiu'times smootli, seiriiorbicular, with a si)i2;le tooth at the poste-^'-^r 

 angles, sometimes very unequal and tubercular ; the prosternum is either carinated or terminated in a point, 

 either flat, truncated, entire, or notched at its posterior extremity, which is applied to a produced lobe of Ibe mesu- 

 sfernuin ; the fore-le«:s at least are wide apart at the base. The scutelluni is hirg;e iu some, the tarsi short and 

 dilated, 



Lissonolus, Dalm. (with the antenna.' greatly comprcsseil and serrated, or semi-pectinated and ion^), and 



MegaderiLS, Dej. (with simple antenna-, shorter than the body), form a first division, having the thorax nearly 

 semi-orbicular and very large, with a single tooth on each tide at the hind angles, and the scutellum very 

 large. 



Those with tlie thorax very rough and nmltidentate, the antenna' long, simple, or slightly spined, and tliL- thorax 

 very large, form four subgenera. 



Dorcacerw,?, Dej., having the head vertical, large, and nearly as broad as the thorax, and tlie scutellum small. 

 Type, C'rramhi/.v Oarba/i/.s^OViy. 



r/-(ic//y/rft'rcA-, Dalni., with the thorax large and nmrh broader tlmn the lu-ad ; the posteiior extremity of the 

 prosternum, and also the opposite part of the mesostemutn, eltr-.vated and keelrd. 



Lophotioctrns, Latr., has the head much narrower than the thorax, and with the third and three following joints 

 ol' the antennje furnished w'ith hairs. Ceramhijx barbicornis, Oliv., &c. 



Ctenodes, Klug, diflers from the preceding in having theantenuie much shorter than the boily, and pectinated or 

 serrated ; the thorax toothed at the sides. {Ctcnodeszonata, &c,) 



In tlie following the thorax, either square or cylindrical, orbicular, or nearly globular, is much shorter than the 

 elytra; the prosternum is neitliL-r carinated nor pointed at its posterior extremity, and the scutellum is always 

 small. 



PluciiicO'-ffus, Latr., dilTrrs from all the rest in having the thii-il and following joiids of the male antennae pro- 



are only simple 



h.mr they emit, 

 , and e\'en than 



longed into tlattened platts, forming a large fan. P. Dvjcniiii ; Brazil. In the resd the anten 

 ur serrated. 



t'a//ic/iromn, Latr., comprises many species, remarkable for their colours, and the agrer;ib 

 and tliese exhibit a curious anomaly in the maxillary palpi being very much smaller than the labial, 

 the maxillary lobe, which is advanced; the posterior 

 tibiae are often compressed. [The only Uritish species,] 

 Cerambijx moschatus, Linn, [or the Musk Beetle as it has 

 been erroneously named, the scent it emits being more 

 like otto of roses than mn^k], is about an inch long, en- 

 tirely green, or shaded with blue, some specimens bein^ 

 of a more golden colour. [This handsome species is very 

 common upon willows, and may be easily detected by its 

 scent.] There are numerous other species found on the 

 Continent and in America. 



Other Longicornes of the same division, but with J' 



ordinary-shaped maxillary palpi, are distinguished from 

 the following by possessing twelve distinct joints in the 

 antennas, at least in the males ; we unite them into the 

 single subgenus — 



Acanthoptenis, Latr.— Some American species, with 

 the thorax nearly square or subcylindrical, and the elytra 

 ordinarily terminated by one or two spines, are culled ^'^ 



Stenocorus, by Dalman ; others, peculiar to the western parts of the Ohl \Vt 

 and the antenna? simple and not fasciculated, form the subgenus Pm-jnir'tcc/t 

 fontainli, &c. Another species, 



Cerambijx alplnus, Linn., has the body depressed, and the third and three following joints of the antenna? ter- 

 minated by a little bundle of hairs. 



The following Cerambycini have only eleven joints titthe antenniv ; some, or 

 long and setaceous ; the last joint of the palpi in the form (if a reversed cone 

 and a little dilated in the middle, or oblong and nearly cylindrical ; it i 

 These compose the subgenus 



CVr^mii/^ proper, some of which li;ive been further separated under the name nf Ilnitin/lc/u-ni.-,: having the 

 thorax very rough, and spined or tubercled at the sides in the middle, with the third, fourth, and hfth joints of the 

 antenna.' evidently thicker than the following, thickened, and rounded at the tip. C. fieros, Fab., is an abundant 

 continental species, the larva of which forms deep burrows in oak wood, and which is probably the Cossus of the 

 anci'.'uts. 



AVe unite in the same subgenus diilerent species of Calllchronia of Dejean, having the thorax entire or scarcely 

 unequal, and either oval or subcylindrical. These arc exotic, and nearly all from America, being of sniall size. 



We further unite in the same genus the Giwnuje of Dejean, having the thorax very long and cylindrical. 



The Cerambycini with the antenna? generally scarcely longer than the body, the thorax always unarmed, and 

 S( nietimes nearly globular or orbicular, and sometimes narrower and subcylindrical, the (lalpi always very sliorti 

 tej-iiii ited by '^ ibicker joint than in tlie preceding, form the genus CaU'idinm, which now constitutes three: — 



rid. 



\\ith the thorax nearly globular, 

 T\'pes, Cerumbii.i Ku'lilcri, Dt\s- 



at least the males, have tVie antenoiE 



; the timrax is either nearly square 



is often rugose, and tubercled at the sides. 



