OF PHILADELPHIA. 123 



Inhabits Missouri. 



liudy black, above opaque and covered with dense very sliort 

 prostrate cinereous hair : thotax with a few bhiekish dots which 

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

 lateral edge piceous : elytra with sparse shorter hairs than the 

 tliorax ; 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. 



Jjcngth 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 Sifph<i 

 in'niKif'i, but the thorax is destitute of elevations. 



[Identical with the European S. lapponica. — 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 amrruana Fabr., but more closely re- 

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

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

 the Upper Missouri. 



'■^. S. TRUNCATA. Elytra smooth ; truncate at tip. 



Inhabits Arkansa. 



liody oblong, blackish-brown ; numerous minute punctures, 

 furnishing short black hairs: thorax plane ; an oblicjue imj)ressed 

 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. 



Ijcngth three-fifths of an inch. 



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

 1S23.] 



