1 86 MEMOIRS ON THE COLEOPTERA 



Elytra black, with a well defined oblique humeral red spot; striae very 

 finely punctured 19 



1 8 Form moderately stout, convex, strongly shining in both sexes, 

 deep black, with fine diaphanously pale side margins, the elytra 

 with very feeble bluish metallic lustre; stiff hairs rather longer than 

 usual, especially long and bristling on the anterior parts; head con- 

 vex, very coarsely punctate, slightly narrower than the prothorax; 

 antennae slender, pale testaceous; prothorax very nearly as long 

 as wide, the sides broadly undulato-rotundate, moderately converging 

 posteriory, the angles sharply prominent and reflexed; base strongly, 

 unevenly arcuate, much narrower than the apex, which is sinuato- 

 truncate; surface coarsely, deeply and closely punctate, the side 

 margins very narrowly and inconspicuously reflexed; elytra two- 

 fifths longer than wide, three-fourths wider than the prothorax, 

 much wider posteriorly than at base, the apices obliquely truncate, 

 rounded a little internally; stiiae coarse but only feebly concave, 

 very coarsely, rather closely punctate, the punctures smaller and 

 more distant laterally and apically, the intervals nearly flat but 

 inclined inwardly, except apically, their outer limits more promi- 

 nent than the inner, finely, sparsely and irregularly punctate; 

 under surface black or paler, the sterna very coarsely, closely 

 punctate; male with the last ventral evenly rounded. Length 

 (cf 9 ) 9.5-11.0 mm.; width 3.3-3.7 mm. Rhode Island to Penn- 

 sylvania, also New York (Lake Champlain). [pubescens Dej.]. 



pilosa Say 



Form less stout, the size smaller, similar in coloration and lustre, except 

 that the elytia have a nubilously testaceous spot at the humeri; 

 head similar and with very prominent eyes but with the punctures 

 much less coarse; prothorax similar in form but with the hind angles 

 very obtuse and blunt, though rendered prominent by a similar 

 adjacent sinuation, the punctures numerous but much less coarse, 

 in fact having but little more than half the diameter and relatively 

 less close-set, the erect hairs shorter and less conspicuous, like those 

 of the head; elytra nearly similar in form though rather less inflated 

 posteriorly and with the apices almost evenly arcuato-truncate, 

 with the outer angles more broadly rounded; sculpture almost 

 similar in every way; third interval with two setigerous punctures, 

 which are not observable or extremely indistinct in pilosa; under 

 surface and legs nearly similar, the sterna rather less coarsely or 

 closely punctate. Length (cf) 9.0 mm.; width 3.0 mm. New 

 York (Lake Champlain) borealis Lee. 



Form still narrower and much smaller, strongly shining throughout, 

 piceous-black, the elytra obscure testaceous, feebly and very in- 

 definitely shaded with piceous posteriorly; hairs rather short, not 

 bristling; head rather small, with very prominent eyes, rather 

 strongly but sparsely punctate, the antennae slender, testaceous; 

 prothorax rather small though wider than the head, as long as wide, 

 the sides unevenly rounded, converging posteriorly, the angles 

 sharp, prominent and abruptly reflexed; base broadly, evenly 

 arcuate, much narrower than the apex; surface deeply but not very 



