OF PHILADELPHIA. 151 



mentum is much dilated and at tip emarginate, concealing the 

 inferior portion of the maxillae, with the exception of a point 

 near their base. The form of the thorax agrees with Akis, but 

 agreeably to Latreille's definition of that genus, it cannot have a 

 place there. 



[Belongs to EuscJii(ks Lee; StenomotyJm \\ Sol. — Lec] 



2. A. POLITA. — Black, polished, glabrous ; thorax with acute 

 angles and reflected lateral margin. 



Inhabits Arkansa. 



Body deep black, polished, glabrous ; head rugose with con- 

 fluent punctures: labrum with [256] minute black hairs above 

 and rufous ones on the anterior edge : thorax with minute, dis- 

 tant punctures ; anterior edge concave ;. anterior and posterior 

 angles acute, not prominent; lateral margin reflected, the edge 

 arquated, not excurved near the base ; basal edge nearly recti- 

 linear : scutel minute : elytra slightly and irregularly rugose, 

 destitute of punctures or impressed lines ; exterior edge pi'omi- 

 uent and reflected near the base, rounded towards the tip ; hu- 

 meral angles acute. 



Length more than half an inch. 



Like the preceding species, and several of the Blaps, this spe- 

 cies occvirs under dried bison dung in the extensive region bor- 

 dering the Rocky Mountains. The antennae and mentum are 

 similar to those of A. opaca. 



[Also a Euscliides. — Lec] 



3. A. ANASTOMOSIS. — Black, covered with short whitish hairs ; 

 elytra profoundly grooved. 



Inhabits Arkansa. 



Body black, clothed with short, dense yellowish-white hair : an- 

 tennas hardly attaining the base of the thorax, third joint hardly 

 longer than the fourth, penultimate joint largest, terminal one 

 smallest and rufous : thorax, angles subacute, anterior edge con- 

 cave ; lateral margin hardly reflected ; edge arquated, very 

 slightly excurved near the base : basal edge rectilinear : elytra 

 each with three profound and concave grooves at the base, of 

 which the sutural one extends to the tip, and the two others 

 terminate beyond the middle, [257] at the origin of two other 

 much abbreviated grooves, which are confluent before the tip : 

 humerus not rounded. 

 182-1.] 



