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* 10 of Drury 

 rig. 45. (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 arid 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, Cerambycid^e, 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 antennae, which are not saw-toothed, but generally 



* P. cylindriens of Fabricius. 



[io This species was very properly separated by Serville as a distinct genus 

 Orthosoma. — Lec] 



