32 AMERICAN ENTOMOLOGY. 



obsoletely reddish-brown ; exterior edge acute : epipleura obso- 

 letely grooved, scabrous, punctured, and from the base to near 

 tbe middle tinged with reddish-brown : anterior thighs dilated, 

 and armed with a prominent spine near the tip. 



Length nearly one inch and one-fifth. 



The gradually recurved form of the lateral margin of the 

 thorax in the preceding species, gives to the whole thorax a 

 somewhat concave appearance, notwithstanding the convexity of 

 the disk. In this conformation the present insect is obviously 

 distinct, although very similar as respects general color, the form 

 of the elytra, feet, and abdomen. The thorax here exhibits a 

 regular convexity, which gradually subsides towards the lateral 

 edges. This species occurred in Missouri, near Council Bluff. 



The upper left figure. 



Blaps obscura. — Specific character. Blackish : elytra sca- 

 brous, grooved, dark reddish-brown, margin rounded, thoracic 

 margin not reflected. 



Blaps obscura nobis, Journ. Acad. Nat. Sci. vol. iii. p. 250. 



Desc. This species resembles the preceding, but the thorax is 

 proportionally longer, the elytra are of a dull reddish-brown 

 color, approaching to piceous, and the lateral margin is rounded 

 so as to exhibit no edge. 



Length more than one inch. 



Obs. I obtained this insect in the country bordering the river 

 Platte, within a hundred miles of the Rocky Mountains. 



The lower left figure. 



Blaps hispilabris. — Specific character. Blackish ; elytra 

 scabrous, grooved ; sutural margin obsoletely reddish-brown ; 

 labrum with black, rigid hairs. 



Blaps hispilabris nobis, Journ. Acad. Nat. Sci. vol. iii. p. 259. 



Desc. In form of the elytra, their lateral curve, rotundity of 

 edge, sculpture and color, this species resembles the obscura ; but 

 the anterior angles of the thorax are distinctly excurved and 

 acute, the posterior angles viewed from above exhibit no excurva- 

 ture 5 the scutel is proportionally smaller and more rounded, and 

 the labrum is distinctly armed with many black rigid hairs ex- 

 tending forward, and projecting beyond the extremity of the 

 labrum. 



Length more than four-fifths of an inch. 



Inhabits Missouri, 



