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184 Say^s Descriptions of new 



ing in that part a very small, acute, lateral projection : ^ 

 elytra smooth to the eye, but on close inspection minute- 

 ly and irregularly rugose and punctured ; lateral margin 

 rounded. 



Length over three fifths of an inch. 



Much like B. cequdUs, but distinguishable by its al- 

 most total want of polish, the minute prominence of its 

 posterior angle, and the microscopic roughness of its 

 elytra. 



3. B. maura. Elytra with impunctured, obtuse strife. 

 Inhabits Mexico. 



Body black: head punctured, an impressed line be- 

 tween the antennae: thorax with hardly discernible 

 punctures ; wider than long ; posterior angles not round- 

 ed ; lateral edge a vertically elevated line, not in the 

 slightest degree curved outwards near the posterior 

 angle : elytra somewhat depressed, obtusely striated or 

 grooved, the grooves impunctured, but viewed in a par- 

 ticular direction they appear obsoletely rugose ; intersti- 

 tial lines convex ; lateral margin rounded and evident- 

 ly irregularly punctured : epipleura impunctured : feet 

 punctured. 



Length more than three fifths of an inch. 



4. B. obliterdta. Elytra with obsolete grooves; 

 lateral margin rounded* 



Inhabits Mexico. 



r 



Body black, immaculate : head slightly punctured ; an 

 impressed line between the antennae : thorax wider than 

 long ; lateral edge a slightly elevated line, a little ex- 

 curved at the posterior angle, which is consequently 

 somewhat acute : elytra with obsolete grooves, minutely 

 punctured ; lateral margin rounded and smooth : thighs 

 not obviously punctured. • 



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