OF NATUBAL HISTORY. 63.'5 



OMALLSUS Geoffr., F. 



1. O. MAROINKLLUS Fabr. (Lycus) Syst. Eleuth. 



Inhabits Pennsylvania; Massachusetts, Harris. [155] 



[This and tlie five following species belong to Erus. — Lec] 



2. (). COCCINATUS. — Sanguineous; head and beneath black. 

 Inhabits Pennsylvania and Indiana. 



Body sanguineous; head blaok ; mandibles pale reddish ; tlio- 

 ra.\ darker than the elytra, its depressions dusky; two longitutli- 

 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 own 

 length from each other ; wings blackish : beneath black. 



Length over two-fifths of an inch. 



3. 0. MU.vnus. — Bright sanguineous; antenna) black. 

 Inhabits Indiana. 



Body entirely bright .sanguineous : antenna;, excepting the 

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

 dinal elevated lines, distant in the middle and meeting before 

 iho anterior and posterior edges of the thorax, enclosing a rhom- 

 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 

 one.«<, 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. 0. HU.MEiiALi.s F. (Lycus) Syst. Eleuth. [156] 

 Inhabits also Indiana ; Mas.sachu.setts, Harris. 



It varies in having the humeral margin obsolete. 



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

 lowish each side. 



1835.] 



