LONG-HORNED WOOD-BORERS. 
157 
of the larger species. They differ from all the other Longicorn beetles, 
(with a few rare exceptions,) in having their heads vertical, the front 
[rig. 77.] 
6 
o 
Saperda bivittata, Say ; the Round-headed apple-tree borer a, larva ; b, pupa ; c, beetle— after Riley. 
or forehead presenting a prominent angle, and the face falling perpen- 
dicularly below it, so that when viewed directly from above the face 
cannot be seen. This position of the head, in connection with their 
long curved horns, gives to these beetles a fanciful resemblance to a 
goat, and terms indicative of this similarity often occur in their nomen- 
clature. They are also distinguished by the rather long and spindle- 
shaped last joint of their palpi, especially the maxillaries, and by a 
little groove almost always found on the inner face of their tibiae. The 
granulations of the eyes, which are usually coarse in the Prionides and 
fine in the Lepturides, and which serve to separate the Cerambycides 
into two nearly equal sections, are so variable in the Lamiides as to be 
of but little value in classification. 
These insects generally remain stationary by day upon the trunks 
and branches of trees, and often escape detection by the resemblance 
which they bear, in the hues and sculpture of their bodies, to the color 
and inequalities of the bark on which they repose. Their colors are 
therefore, as a general rule, less vivid than those of the Cerambycides, 
their prevailing tints being brown and gray. 
This is the most numerous sub family of Longicorues, aud is said to 
contain as many genera and species as the other three sub-families 
united ; but in this country they do not appear to be more numerous 
than the Cerambycides. 
The larvae resemble those of the Cerambycides in being of a nearly 
cylindrical form, but a little tapering behind, and considerably swollen 
at the anterior# extremity, with a small head, which is retractile within 
the enlarged anterior segment. These larvae differ, however, from those 
of nearly all other Longicorns in being wholly destitute of legs. 
I 
