COLEOPTERA. 85 



toothed in the male, and more slender in the other sex; the 

 thorax is short and wide, and armed on the lateral edges with 

 three teeth ; the wing-covers have three slightly elevated lines 

 on each of them, and are rough with a multitude of large 

 punctures, which run together irregularly. It measures from 

 one inch and one 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, Priormsmiicolor* of Diury, inhabits 

 pine-trees. Its body is long, narrow, and flattened, of a light 

 bay-brown color, with the head and antenuGB 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 elevated 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, Cerambvcid.e, of the tribe to 

 which it belongs. The Cerambycians have not the very promi- 

 nent 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 slender and 

 tapering, sometimes of moderate length, sometimes excessively 

 long, especially in the males; the thorax is longer and more 

 convex than in the preceding family, not thin-edged, but often 

 rounded at the sides. 



Some of these beetles, distinguished by their narrow wing- 

 covers, which are notched or armed with two little thorns at 



* P. cylindricus of Fabricius. 



