COLEOPTERA. 119 
In the fourth and last tribe, that of the LerrurEta#, we find Lon- 
gicornes in which the eyes are rounded, entire, or scarcely emargi- 
nated, and where, in this case, the antenne are inserted before, or at 
most at the anterior extremity of this slight emargination. ‘The head 
is always inclined posteriorly behind the eyes in several, or abruptly 
narrowed at its junction with the thorax, in the manner of a neck; 
the thorax is conical or trapezoidal, and narrowed before. The elytra 
become gradually narrower. 
This tribe forms the genus 
Leprura*, Lin., 
With the exception of certain species which belong to the pre- 
ceding tribes and to the Donaciz. Thus modified, this genus cor- 
responds to the Sfenocorus of Geoftroy, and the Rhagium and Lep- 
tura of Fabricius. 
Sometimes the head is elongated posteriorly, immediately behind 
the eyes. The antenne, frequently shorter than the body, are approx- 
imated at base, and inserted beyond the eyes, on two little eminences 
in the form of tubercles, and separated by an impressed line. The 
thorax is generally tuberculous or spinous on the sides. 
Here, the palpi are filiform; the last joint of the maxillaries is 
almost cylindrical, and the same of the labials ovoid; the third and 
two following ones of the antennz are dilated at their external angle, 
and are curved and silky, particularly in the males. Such are those 
which constitute the 
Desmocerus, Dey. 
The thorax is in the form of a trapezium, without tubercles or 
points on the sides; its posterior angles are extremely pointed. 
The maxille and labium appeared to me to resemble those of the 
Lamiee. 
But a single species, well represented with all its details by 
Knoch, is known. It inhabits North America f. 
There, the palpi are inflated at the extremity, and terminated by 
a joint in the form of a reversed cone or triangle. The antenne are 
regular, glabrous, or simply pubescent. 
Some are removed from the others, by the fact that their males 
* Or the Sfenocerus of the first edition of the Régne Animal, a denomination 
which I have thought it best to suppress, on account of the confusion resulting from 
the different applications that have been made of it. 
N.B. Messrs. Lepeletier and Serville—Encyc. Méthod., X, 687—have placed in 
this tribe a genus established by them under the name of EuryprERA, which should 
be distinguished from all those of this division of the Longicornes, by the number of 
joints in the antennz, amounting to twelve instead of eleven. Its type is an Insect 
of Brazil, which is unknown to us. 
+ Stenocorus cyaneus, Fabs; Kunoch, N. Beyt., 1, p. 148, vi, i.; Rhagium cyaneum, 
Scheenherr, 
