OF PHILADELPHIA. 157 



The tubercles which are situated upon some of the interstitit:! 

 lines of the elytra, are very minute, and on some specimens 

 nearly obsolete. It is an insect of frequent occurrence. Mr. F. 

 V. Melsheimer named it depressus, but as it does not agree with 

 the description of the depressus as [267] given by Fabricius, 

 Olivier, and Herbst, I have appropriated to it a new designation. 



3. T. TERMINATUS. — Blackish-browu ; terminal joint of the 

 antennas fulvous. 



Inhabits Missouri. 



Body blackish-brown, punctured : palpi, antenna at base, and 

 labrum, piccous; terminal joint of the antennas fulvous: thorax 

 subinequal : a longitudinal impressed line ; anterior edge con- 

 cave : elytra profoundly striated, the striae punctured : scutel 

 dark piceous. 



Length half an inch. 



The inferior part of the body varies in its depth of coloring, but 

 is reddish-brown. The fulvous joint of the antennae, impressed 

 thoracic line, and concave anterior thoracic edge, sufficiently dis- 

 tinguish this species from others of this country. 



[Belongs to Stenocliia. — Lec] 



DIAPEMS Geoff. Latr. 



1. D. EXCAVATA. — Black : head excavated ; and with two 

 horns on the vertex ; antennae rufous. 



Inhabits Arkansa. 



Head with two parallel, prominent, cylindrical, piceous horns, 

 which project forward in a line with the body, and originate be- 

 tween the eyes : front between the horns deeply excavated ; an 

 indentation each side before : antenna) and palpi pale rufous : 

 mandibles black : thorax minutely punctured ; [268] lateral edge 

 nearly rectilinear, or but slightly curved : an indentation each 

 side of the middle on the posterior margin : elytra with impressed 

 punctured stricC : beneath punctured : feet dusky rufous or 

 piceous. 



Length less than one-fifth of an inch. 



The horns disappear in the female, and are supplied by two 

 short tubercles. This species differs from viridipennis Fab., in 

 color, in being destitute of the two small horns on the front of 

 the clypeus, and in the direction of the horns of the vertex, which 

 1824.] 



