342 MEMOIRS ON THE COLEOPTERA 



or less prominent as a rule, and the foveae are always bistriate. The 

 elytral striae vary greatly from deep to almost obsolete, and are 

 more or less evidently punctate; the scutellar stria varies from dis- 

 tinct to obsolete. There are no peculiar modifications at the ab- 

 dominal apex in the male and the anterior tarsi are well dilated in 

 that sex; there is a single terminal puncture at each side in both 

 sexes. 



In the statement given below I have been obliged to identify the 

 published species from the short original diagnoses and may have 

 mistaken some of them, but so far as known to me our species are as 

 follows : 



Prothorax parallel at the sides for a considerable distance before the basal 



angles, which are right 2 



Prothorax very briefly constricted at base, the angles notably obtuse. 10 

 2 Scutellar stria long, uniting with the first stria at a considerable dis- 

 tance behind the scutellum. Body rather narrow and elongate, 

 strongly convex, polished, blackish-piceous, obscure rufous beneath, 

 the epipleura and legs paler rufous; head more than three-fourths as 

 wide as the prothorax; eyes large, moderately prominent; anterior 

 sulci broadly impressed, parallel; antennae obscure ferruginous and 

 rather stout, extending well behind the thoracic base; prothorax 

 only a fourth wider than long, the base four-sevenths the maximum 

 width, two-thirds as wide as the apex, which is feebly sinuate, with 

 well rounded angles; sides broadly, evenly arcuate, abruptly sinu- 

 ate at basal eighth, the sides thence diverging to the very sharp 

 basal angles; anterior marginal incised line deep, entire; stria, ex- 

 tending from it to the base, deep; anterior impression obsolete, the 

 posterior evident near the foveae, which are moderate, impunctate; 

 fine lateral carina strong and conspicuous; elytra oval, two-thirds 

 longer than wide, about a sixth wider than the prothorax, the sinus 

 very feeble, the lateral series not interrupted; striae deep, distinctly 

 and closely punctate, the dorsal puncture large, just behind the 

 middle and on the outer side of the second stria; seventh stria finer 

 and less impressed than the sixth but distinct; prosternum feebly im- 

 pressed; under surface impunctate. Length (o") 12.7 mm.; width 



4.2 mm. Iowa distincta n. sp. 



Scutellar stria extremely short, or, as a general rule, wholly obsolete. . .3 

 3 Elytra sometimes slightly narrower than the prothorax, the sides of 

 which are more strongly rounded than usual, the base but little 

 more than half the maximum width. Body rather elongate, convex, 

 polished, black; under surface black, the legs piceous-black; head 

 fully three-fourths as wide as the prothorax, the sulci slightly arcu- 

 ate and feebly converging; prothorax two-fifths wider than long, 

 the sides strongly arcuate, abruptly sinuate near the base, the sides 

 thence parallel and straight to the right angles; base four-sevenths 

 the maximum width, less than three-fourths as wide as the broadly 



