MR. HALDEMAN'S DESCRIPTIONS OF COLEOPTERA. 105 



A. METALLicus Hald. Shining black, with a greenish metallic reflexion ; pronotum 

 sparsely punctate ; elytra punctate-striate. Long. 2| lines. Maryland, in May. 

 Head hemi-hexagonal, sub-auriculate, widely emarginate in front, margin reflexed ; 

 surface scabrous and confluently punctured anteriorly and laterally ; above smooth, 

 with fine distinct punctures ; and three transverse indistinct tubercles posteriorly : 

 pronotum convex, scarcely margined, with fine and distant punctures : scutel smooth: 

 elytra finely punctate striate : beneath black, feet faintly metallic, posterior femora 

 bright brassy. This ispecies, of which I found but one specimen, is allied to the 

 preceding, but the elytral punctures are more distinct, and the striae less so. 



A. STERCORATOR Ftthv. \. 81. No. 58 (Amer. Merid.) Black; pronotum densely 

 punctured, punctures large posteriorly, and diminishing to a minute size anteriorly : 

 elytra coarsely punctate striate, interstices convex. Long. 2J, lat. 1 line. 

 Shining black, feet and margins with a rufous tinge ; tarsi palpi and antennse paler, 

 M'ith a tinge of flavous : head convex, distantly hemi-hexagonal, auriculate, widely 

 emarginate anteriorly, anterior angles obtusely rounded, sides convex, margins 

 reflexed ; surface minutely and densely punctate, becoming coarser, towards the 

 margin ; posterior portion along the pronotum, distinctly punctate : pronotum convex, 

 deeply and widely emarginate for the reception of the head ; anterior angles obtuse 

 and projecting ; posterior angles obtuse, and truncate towards the humeri ; posterior 

 and lateral margins convex, and margined : elytra coarsely striate ; striae with 

 punctures which have a tendency to crenulate the margins of the interstices : 

 abdomen beneath, and posterior femora, sparsely punctate. Not being confident that 

 this is the true stercorator, I give such a description as to render the insect I have in 

 view recognisable. 



A. cvRTVS Hald. Short, shining black; beneath, feet, and margins of the head 

 and prothorax rufo-piceous. Long. 2, lat. 1 line. Rocky Mountains. 

 Head finely punctured, hemi-hexagonal, auriculate, margins reflexed, clypeus 

 emarginate ; front with three transverse tubercles, the medial one the largest, the 

 lateral ones wanting in a second individual; antennae and palpi flavous : pronotum 

 convex, slightly margined, finely and densely punctured : scutel impunctate 

 posteriorly : elytra smooth, faintly punctate and crenulate-striate ; ninth or 

 sub-marginal stria abbreviated, and deflected into the marginal one anteriorly ; 

 eighth still more, and seventh and sixth less abbreviated anteriorly. 



A. RURicoLA. Mels. Proceed. Acad. ii. 136. {rusicola, in error.) Var. a. Black 

 above. 



