154 ACADEMY OF NATURAL SCIENCES 



very obvious and impressed, and the sutural margin is I'eddisli- 

 brown, but this color is sometimes so indistinct as not to be per- 

 ceptible but upon close inspection. As in the two preceding 

 species the thighs are unarmed. 

 [A species of Elcodcs. — Lec] 



8. B, TRicosTATA. — Black, with minute hairs; elytra each 

 with three elevated lines. 



Inhabits Missouri and Arkansa. 



Body oblong-oval, black, immaculate, with numerous minute 

 prostrate hairs :. thorax with numerous minute punctures, fur- 

 nishing hairs; transversely subquadrate; anterior edge concave; 

 basal edge rectilinear, covering the base of the elytra; lateral 

 edge arquated, near the posterior angles excurved ; angles 

 rounded : elytra scabrous, with small elevated points furnishing 

 hairs ; three elevated lines above ; a common sutural one, and a 

 lateral one on the edge ; intermediate spaces broad, flat, not con- 

 cave, [ 263 ] and sometimes with the appearance of a slightly 

 elevated longitudinal line alternating with the others : epipleura 

 simply scabrous. 



Length three-fifths of an inch. 



Not unfrequent beyond the Mississippi river. Very distinct. 



[Also belongs to Eleodcs, — Lec] 



9. ]J. OPACA. — Black, with minute hairs ; elytra destitute of 

 stria3 or conspicuous punctures, lateral edge acute. 



Inhabits Missouri and Arkansa. 



Body black opaque, oval-acute, with very minute prostrate 

 polished whitish hairs : thorax with acute anterior, and obtusely 

 rounded posterior angles ; lateral edge not thickened or reflected, 

 sublinear or hardly arquated : elytra destitute of striae and of 

 conspicuous punctures ; basal edge concave for the reception of 

 the base of the thorax; humeral angles acute; lateral edge 

 acute. 



Length two-fifths of an inch. 



The humeral angles so closely embrace the lateral base of the 

 thorax, as to present hardly an interruption to the regularity of 

 the lateral curve of the body. 



[This species, as noted by me, (Proc. Acad. Nat. Sc. 1858, p. 

 182,) has the first and second joints of the anterior tarsi of the 



[Vol. III. 



