366 MEMOIRS ON THE COLEOPTERA 



eyes, the sulci moderately separated, arcuate and slightly converg- 

 ing; antennae rather long, obscure ferruginous; prothorax a fifth 

 wider than long, widest at anterior two-fifths; base feebly sinuate 

 medially, arcuate laterally, narrower than the apex and three-fourths 

 the maximum width; sides broadly reflexed, arcuate, oblique and 

 straighter basally, the basal angles broadly rounded; foveae united, 

 forming a feebly punctured concavity; scutellum narrowly triangu- 

 lar, as long as wide; elytra two-thirds longer than wide, two-fifths 

 wider than the prothorax; striae deep, with the bottom extremely 

 finely punctulate, the marginal nearer to the sides than to the eighth 

 stria; intervals very convex. Length (cf 1 ) 15.0 mm.; width 5.4 mm. 



Indiana. [Pt. protensus Lee.] relicta Newm. 



Carina very distinct 3 



3 Pronotal foveae separated . " 4 



Pronotal foveae coalescent, forming a large deep concavity, with the bot- 

 tom punctate and usually almost even 8 



4 Prothorax more trapezoidal, the base distinctly narrower than the 

 apex, with the longer foveae separated by a wide and nearly flat de- 

 pressed surface; antennae longer, almost half as long as the body. 

 Rather stout but only moderately convex; head three-fifths as wide 

 as the prothorax, with prominent eyes and very broadly impressed 

 sulci; prothorax a sixth wider than long, widest well before the mid- 

 dle, the base nearly truncate; sides broadly reflexed, straight bas- 

 ally, the angles broadly obtuse and rather rounded; carina moder- 

 ately strong, long, outwardly arcuate; elytra two-thirds longer than 

 wide, two-fifths wider than the prothorax, gradually broadening 

 and with feebly arcuate sides to behind the middle; striae very deep, 

 the punctulation at the bottom extremely fine; intervals very con- 

 vex. Length (9 ) 18,0 mm.; width 6.4 mm. North Carolina (Ashe- 



ville) proba Csy. 



Prothorax less trapezoidal, about as wide at base as at apex, the sides 

 more evenly arcuate; foveae separated by a pronounced elevation, 

 which becomes obsolete posteriorly; antennae not quite so long. . . .5 

 5 Prothorax subquadrate, but little narrower at base than anteriorly. 

 Body rather narrow, elongate, convex, deep black and polished; 

 head three-fifths as wide as the prothorax, with prominent eyes; 

 sulci coarse, parallel; antennae rather long and slender, ferruginous, 

 blackish basally; prothorax scarcely visibly wider than long; base 

 nearly five-sixths the maximum width, feebly sinuate medially, ar- 

 cuate laterally; apex very feebly sinuate; sides coarsely reflexed, 

 feebly arcuate, slightly less so basally, the angles very broadly ob- 

 tuse; transverse impressions diffuse and feeble, the stria subentire; 

 foveae linear, the intervening depression shallow, with a longitudinal 

 convexity ending before the base; carina short, distant from the 

 margin; elytra three-fourths longer than wide, nearly a third wider 

 than the prothorax; striae very deep, the minute punctules at the 

 bottom scarcely visible and widely separated, the marginal nearer to 

 the edge than to the eighth; intervals very convex; posterior sinus 

 distinct. Length (cf) 14.5 mm.; width 4.8 mm. Ontario. 



quadrifera n. sp. 



