North American Coleopterous Insects. 187 



Length three tenths of an Inch. 



Resembles O. pulluniy Nob.^ but is smaller, and the base 

 of the thorax is more rectilinear. 



- 2. O. notum Nob. Specimens found near New Or- 

 leans vary from those of more northern regions, in being 

 a little polished, and in having the ely tral punctures larger. 



> 



TenebriO; Lin. 



L T. supyressus. Thorax large ; clypeus entire; ely- 

 tra with punctured strise. 



Inhabits Mexico. 



Body black : head densely but; minutely punctured ; 

 clypeus a little reflected and entire : labrum nearly con- 

 cealed : thorax densely and minutely punctured ; rather 

 large ; a large, slightly indented spot on the posterior sub- 



an 



tnan 



punctured^ and crenate striae ; insterstitial spaces convex, 



anterior 



strong tooth. 



half 



eM 



larger, more arcuated on the lateral edge, and more nar- 

 rowed behind ; the anterior tip of the clypeus is not so 

 prominently reflected, and the contraction towards the 

 junction of the thorax and abdomen is more obtuse. 

 2. T. rufinasus. Suboval, black ; head before, an- 



ffmous 



D 



Inhabits Louisiana. 



Body oval, a little oblong ; densely punctured : head 



on the anterior 



