OF rHILADKLl'IlIA. 153 



each other than the length of their diameters; impressed striit 

 none; interstitial lines with a lew [261] remote, acute, minute 

 punctures; lateral margin irregularly puucturod, rounded : thigh< 

 rohust, nuiti<-. 



Length seviii-tciiths to four-fifths of an inch. 



This species occurred near the Kocky Mountains. 



[Also an EIrodea. — Lkc] 



(i. J}. AXTRICATA. — Black; elytra irregularly punctured, ami 

 destitute of impressed striae. 



Inhabits Arkansa. 



]}()ily dt'cp black, narrowed aiiteriijrly, oblong-subovate, imma- 

 culate, punctured : head acutely punctured : labruni with rigid 

 hairs: thorax subquadrate, punctures smaller than those of the 

 head and more distant ; lateral edge regularly anjuated ; anterior 

 edge very slightly concave; posterior edge nearly rectilinear, a 

 little arquated each side near the angles which are obtuse : scutcl 

 convex, inipunetured : elytra destitute of striae, or distinctly 

 regular series of punctures ; scabrous with minute slightly ele- 

 vated points, each of which precedes a puncture ; lateral margin 

 rounded. 



Length about half an inch. 



This species (K-curs in the country of tlie Arkansa and Platte. 

 near the mountains. Mr. .N'uttall also obtained specimens on the 

 Upper Mi.s.souri. It is .somewhat similar to the preceding species, 

 but is shorter, and the sculpture of the elytra sufficiently distin- 

 guish it. 



(.\lso an EIrodca. — Lec] 



7. B. on.soLKTA. — Black ; elytra striate, slightly scabrous ; 

 suture obsoletely reddish-brown. [ 262 ] 



Inhabits Arkansa and Mi.ssouri. 



liody oblong-subovate, deep black, punoturod: head and thorax 

 similar to those of the preceding species : elytra with impressed 

 striae, which are slightly scabrous, with minute elevated points 

 and impressed punctures; interstitial lines also puuctured ; sutural 

 margin obsoletely reddish-brown. 



licngth from half an inch to more than three-fifths. 



Like the preceding, this species inhabits the arid plains in the 

 vicinity of the Rocky Mountains. The striae of this insect are 

 1824.] 



