COLEOPTERA. 107 
of this subdivision might be designated by the title of regular Ce- 
rambyci, in contradistinction to those of the following one, which, in 
many respects, are anomalous, and the last of which seem to be con- 
nected with those of the tribe that follows it. They compose the 
genera Cerambyzx, Clytus, Callidium cf Fabricius, and some of his 
Stenocori, a different genus from that similarly and previously so 
named by Geoffroy. They form the genus Cerambyz of Linnzus, 
to which we must also add some of his Lepture. 
Modern entomologists have augmented the number of these gene- 
ric sections, but their characters are so little distinct, and so much 
blended, that these genera may all be united in one, or in 
CERAMBYX, 
A number of species, all from South America, proportionally shorter 
and wider than the following ones, with the antennz frequently pecti- 
nated, serrated, or spinous, are remarkable for the extent of their 
thorax, the length of which is almost equal to that of the elytra; 
sometimes glabrous, it is almost semi-orbicular, and nearly uniden- 
tated at the posterior angles; at others it is very uneven and tuber- 
culous. ‘Their preesternum is either carinated or terminated in a 
point, or plane, truncated, entire or emarginated at its posterior ex- 
tremity, which is laid on an anterior projection of the mesosternum. 
Their anterior legs, at least, are remote at base. The scutellum is 
large in several; the tarsi-are short and dilated. 
Those of this division, in which the thorax, almost semi-orbicular 
and always very large, is smooth or simply granulous, with a single 
tooth on each side, at the posteriur angles, in which the posterior ex- 
tremity of the presternum is plane and truncated, either unemar- 
ginated, or marginated and laid on the mesosternum; where the 
scutellum is always very large, and the legs are very remote, form 
two subgenera. 
Lissonotus, Dalm.—CrramByx, Fab, 
Where the antenne are long, strongly compressed, and serrated 
or pectinated, and where the posterior extremity of the presternum 
offers no emargination *, 
Mecaperus, Dej.—Catinivm, Fab. 
Where the antenne are simple, and shorter than the body, and the 
posterior extremity of the presternum is emarginated, and receives, 
in that emargination the opposite end of the mesosternum, so that 
they are intimately united or seem to form but one plane f. 
Those in which the thorax is very uneven, tuberculous, or pluri- 
dented, with the preesternum carinated or terminated posteriorly in a 
point, have been arranged in four subgenera. 
* See Schenh., Synon, Insect.; Dalman, Anal. Entom.; aud Germar, Insect, 
Spec. Nov. 
t+ Callidium stigma, Fab,; Dej., Catal., p. 106. 
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