i 



North American Coleopterous Insects. 



155 



2. O. coccinatus. Sanguineous ; head and beneath 

 black. 



Inhab. Pennsylvania and Indiana. 



Body sanguineous ; head black ; mandibles pale red- 

 dish ; thorax darker than the elytra, its depressions 

 dusky ; two longitudinal elevated lines, distant in the 

 middle^ and meeting on the anterior and posterior edges 

 of the thorax, enclosing a rhomboidal space ; from their 

 middle an elevated line proceeds to the lateral edge ; 

 the margin elevated : scutel blackish : elytra with four 

 elevated lines ; interstitial spaces with a longitudinal 

 'slightly elevated line, and transverse ones about the dis- 

 tance of their own length from each other; wings black- 

 ish : beneath black. 



Length over two fifths of an inch. 



3. O, mundus. Bright sanguineous; antennae black. 



Inhab. Indiana. 



Body entirely bright sanguineous : antennte, excepting 



the three basal joints, black : eyes black : thorax with 

 two longitudinal elevated lines, distant in the middle and 

 meeting before the anterior and posterior edges of thd 

 thorax, enclosing a rhomboidal space ; from their middle 

 an elevated line passes to the lateral edge, and an ele- 

 vated abbreviated line on the posterior submargin : elytra 

 with four elevated lines ; interstitial spaces with a longi- 

 tudinal, very slightly elevated line, and transverse ones, 

 about the distance of their own length apart ; venter 



black : tarsi dusky. 



Length one fourth of an inch. 



Much like the preceding, but is only half as large, and 



its colors are differently arranged. 



4. O. humeralis, F. (Lycus.) Syst. Eleuth. 



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