112 INSECTA. 
Those species, in which the head is at least as wide as the thorax, 
and where the latter is almost cylindrical, and simply dilated and 
rounded in the middle, compose the genus Cerrattum of MM. Me- 
gerle and Dejean *. 
Those in which the head is narrower than the thorax, elevated, 
and almost globular, form that of Cirrus, Fab. 
Finally, those in which the thorax, also wider than the head, is 
flattened and orbicular, have retained the generic appellation of 
Catupium. A species of this division, 
C. sangquineus ; Cerambyx sanguineus, L. Oliv., Ib., 70, 1, 
about five lines in length, black, with villous elytra, and thorax 
of a fine sanguineous red, is very common in the wood yards, 
and even houses of Paris, in the spring. The 
C. arcuatus; Leptura arcuata, L.; Oliv., Ib., 70, ii, 16, which 
is about half an inch long, of a deep black, with two bands on 
the thorax, three arcuated streaks on the elytra, and some points 
on their base and extremity of a golden-yellow, is a Clitus. 
This insect also is very common. 
We will terminate this tribe with Insects, which, in relation to 
their palpi, form of their head, thorax, and elytra, as well as in their 
proportions, present remarkable exceptions or anomalies. 
We will commence with those in which the form of the thorax is 
very analogous to that of the preceding ones, and particularly of the 
Certalla. It is equal in width to the head, and to the base of the 
elytra, or scarcely narrower, and either almost cylindrical, or rounded, 
or nearly orbicular, and wider near the middle in both cases. The 
last joint of the palpi is sometimes attenuated near the end and ter- 
minated in a point, and sometimes truncated, thicker, and obconical, 
at the same extremity. All the thighs are clavate, and supported by 
an abrupt, slender, and elongated pedicle. The elytra of the greater 
number are either very short or abruptly narrowed at but little 
distance from their base, and then become subulate. 
In the first place we have those in which no such dissimilitudes are 
to be found, their forms and relative proportions being always the 
same as those of the elytra of the preceding Insects. 
The first genus, 
Osrium, Meg. Dej.—Catuipium, Saperpa, Fab., 
Is characterized as follows: the head rounded, and not prolonged an- 
teriorly in the manner of a snout; palpi filiform, the last joint ter- 
minating in a point; antenne long and setaceous; thorax _long, 
narrow, almost cylindrical, or forming a truncated oval f. 
The second genus, 
* Callidium ruficoli , Fab. ;—C. fugax, Ejusd. ;—Callidium setigerum, Germ. 
+ See Catalogue, &c., of Count Dejean, p. 110. 
