OF NATURAL HISTORY. 633 



OMALISUS Geoffr., F. 



1. 0. MARGINELLUS Fabr. (Lycus) Syst. Eleuth. 

 Inhabits Pennsylvania; Massachusetts, Harris. [155] 

 [This and the five following species belong to Eros. — Lec] 



2. 0. COCCINATUS. — Sanguineous; head and beneath black. 

 Inhabits Pennsylvania and Indiana. 



Body sanguineous ; head black ; mandibles pale reddish ; tho- 

 rax darker than the elytra, its depressions dusky; two longitudi- 

 nal elevated lines, distant in the middle, and meeting on the 

 anterior and posterior edges of the thorax, enclosing a rhomboi- 

 dal 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 distance of their owu 

 length from each other ; wings blackish : beneath black. 



Length over two-fifths of an inch. 



3. 0. MUNDUS. — Bright sanguineous ; antennae black. 

 Inhabits Indiana. 



Body entirely bright sanguineous : antennae, excepting the 

 three basal joints, black: eyes black : thorax with two longitu- 

 dinal elevated lines, distant in the middle and meeting before 

 the anterior and posterior edges of the thorax, enclosing a rhoni- 

 boidal space ; from their middle an elevated line passes to the 

 lateral edge, and an elevated abbreviated line on the posterior 

 submargin : elytra with four elevated lines; interstitial spaces 

 with a longitudinal, 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 difi"erently arranged. 



4. 0. HUMERALis F. (Lycus) Syst. Eleuth. [156J 

 Inhabits also Indiana ; Massachusetts, Harris. 



It varies in having the humeral margin obsolete. 



5. 0. SCULPTILIS.— Piceous; thorax with elevated lines, yel- 

 lowish each side. 



1835.] 



