LONG-HORNED WOOD-BORERS. 
153 
ally more gradual and rounded, and in the Lamiides sharper or more 
abrupt. The face is also rather convex in the Cerambycides, and flat 
in the Lamiides. This distinction, however, is sometimes unreliable, 
and the more definite characters stated in the table of sub families, 
must be resorted to in cases of doubt. But the minor groups can often 
be distinguished by their style of coloration, as hereafter specified. 
The Cerambycides are often seen resting upon the trunks of trees in 
crevices of which the females lay their eggs. Some of the smaller spe- 
cies are found upon flowers. Many of them possess the stridulating 
power described in the general remarks upon this family. The larvae 
resemble those of the Prionides in having six very small legs, but they 
are more cylindrical in their form, and the incisions between the seg- 
ments are more deeply impressed. 
The sub-family of Cerambycides is divided by Lacordaire into two 
groups, which are primarily distinguished by the difference in thefacets 
or granulations of the eyes. In the first group the granulations are 
comparatively coarse and the lines between the facets are deeply im- 
pressed. In the second group the granulations are much finer, and in 
many genera the surface of the eyes, unless strongly magnified, appears 
to be almost plane. But this distinction is only comparative, and can 
only be appreciated by an actual examination of some of the species in 
the two divisions. 
Jn the following table we have first separated the group of Asemini, 
upon the more definite character of the form of the eyes, and then di- 
vided the remainder in accordance with the difference in the granula- 
tions. 
The following is a table of the groups of Cerambycides : 
A. Eyes oval, almost entire, or but little hollowed on the inner side (except Tetropium); second Joint 
of auteume at least halt as long as the third ; form somewhat depressed ; colors obscure : 
Asemiki. 
A A . Eyes with a deep notch or sinus ; second joint of antenna; not half as long as the third. 
B. Eyes coarsely granulated. Form moderately convex ; antenna; usually as long at least as the 
body, often much longer in the males; thighs usually slender ; colors gray or hrown. 
w „„„ - , _ ... C'EHAMBYClin. 
Ey es finely granulated. 
1 . 1‘ brm more or less depressed ; thighs usually strongly clubbed ; colors various Cai.lidiim. 
C C. Form convex ; thighs usually sleuder or moderately and gradually thickened. 
D. Scutellum rounded; size various; colors usually hlack or brown with transverse yellow or 
whitish bands C 1 .YTIN 1 . 
I) D. Scutellum triangular and pointed ; size large or medium ; colors usually black and red : 
B B. 
siaxAsrinj. 
fihe group of Asemini contains two principal geuera, Asemum, Esch., 
(from the Greek asemos — obscure) containing six species of a size a little 
above medium, with small, hairy, and finely granulated eyes, and Crio- 
cetphalus , iM uls., (from A rios — a ram ; and kephale — the head) containing 
nine species of large size, most of them being about an inch iu length, 
with large and less finely granulated eyes, and having from two to four 
large shallow depressions on the disk of the thorax. 
—20 
