96 
COLEOPTERA. 
eighth to one inch and three quarters in length; the females 
being always much larger than the males. The grubs of 
this beetle, when fully grown, are as thick as a man’s thumb. 
They live in the trunks and roots of the balm of gilead, 
Lombardy poplar, and probably in those of other kinds of 
poplar also. The beetles may frequently be seen upon, or 
flying round, the trunks of these trees in the month of July, 
even in the daytime, though the other kinds of Prionus 
generally fly only by night. 
— The one-colored Prionus, Prionus unicolor ^ of Drury 
(Fig. 45), inhabits pine-trees. 
Its body is long, narrow, and 
flattened, of a light bay-brown 
color, with the head and an¬ 
tennae darker. The thorax is 
very short, and armed on each 
side with three sharp teeth ; 
the wing-covers are nearly 
of equal breadth throughout, 
and have three slightly ele¬ 
vated ribs on each of them. 
This beetle measures from 
one inch and one quarter to 
one inch and a half in length, and about three or four tenths 
of an inch in breadth. It flies by night, and frequently 
enters houses in the evening, from the middle of July to 
September. * 
The second family of the Capricorn-beetles may be allowed 
to retain the scientific name, Cerambycidje, of the tribe to 
which it belongs. The Cerambycians have not the very 
prominent jaws of the Prionians; their eyes are always 
kidney-shaped or notched for the reception of the first joint 
of the antennas, which are not saw-toothed, but generally 
* P. cylindricus of Fabricius. 
[10 This species was very properly separated by Serville as a distinct genus 
Orihosoma. — Lec.] 
