OF PHILADELPHIA. 123 



Inhabits Missouri. 



Body black, above opaque and covered with dense very short 

 prostrate cinereous hair : thorax with a few blackish dots which 

 are not elevated : scutel with two large obsolete dark spots, 

 lateral edge piceous : elytra with sparse shorter hairs than the 

 thorax ; three longitudinal elevated acute lines, on each of which 

 the exterior one is shortest, and the interior one is sinuated at 

 tip ; interstitial lines with a series of elevated tubercles ; tip 

 sinuate. 



Length more than half an inch. [193] 



Found by Mr. Thomas Nuttall on the Upper Missouri, and by 

 myself near the Rocky Mountains. It is closely allied to Silpha 

 sintiafa, but the thorax is destitute of elevations. 



[Identical with the European ;S'. Icqjponica. — Leg.] 



2. S. RAMOSA. — Black ; elytra with three elevated branched 

 lines. 



Inhabits Missouri. 



Body black, confluently punctured, immaculate, dilated : thorax 

 destitute of elevations : elytra, with three longitudinal elevated 

 lines; with numerous small lateral branches, which pass over the 

 interstitial spaces; interstitial spaces minutely scabrous, with 

 elevated points. 



Length more than three-fifths of an inch. 



Next in magnitude to amcricana Fabr., but more closely re- 

 lated to incqualis, from which it is at once distinguishable by the 

 branched lines of the elytra. Found by Mr. Thomas Nuttall on 

 the Upper Missouri. 



3. S. TRUNCATA. Elytra smooth ; truncate at tip. 

 Inhabits Arkansa. 



Body oblong, blackish-brown ; numerous minute punctures, 

 furnishing short black hairs : thorax plane ; an oblique impressed 

 line each side ; basal edge profoundly sinuated : elytra dark 

 reddish-brown ; shorter than the abdomen ; transversely truncate 

 at tip ; the exterior angles rounded ; surface entirely destitute of 

 elevated lines ; a transverse slight elevation on the submargin 

 behind the middle. 



Length three-fifths of an inch. 



I found but a single specimen of this insect near [194] the 

 1823.] 



