AMERICAN COMPONENTS OF THE TENTYRIIN^ 39I 



the punctures moderately coarse, rather close-set, still closer and 

 larger but shallow laterally, confused, the feebly impressed lines 

 with rather denser but very obscure aggregations of punctures ; 

 abdomen rather strongly and closely punctured medially. Length 

 9,0-9.6 mm. ; width 3.S5-4.5 mm. Arizona. 



propinquum n. sp. 



10 — Median impunctate line of the pronotum very narrow, subcle- 

 vated, only visible at and behind the middle. Body suboval, 

 strongly convex, somewhat shining, black with a feeble coppery 

 to greenish metallic lustre, each puncture with a small silvery 

 hair ; head rather coarsely, extremely densely and subrugosely 

 punctate throughout ; prothorax rather more than a fourth wider 

 than long, but little narrowed anteriorly, the apex about four-fifths 

 as wide as the base, with the angles rather strongly deflexed though 

 very acute and anteriorly prominent from an oblique viewpoint, 

 the basal angles slightly less than right, with thickened marginal 

 bead and very slightly prominent, the sides subevenly but very 

 feebly arcuate ; surface coarsely, perforately punctate, the punc- 

 tures separated by but little more than their own diameters medi- 

 ally, becoming still coarser and dense laterally, smaller and ex- 

 tremely dense at the edges ; scutellum tumid, impunctate, angu- 

 late posteriorly ; elytra rather rapidly and arcuately narrowed at 

 tip, with the angles simple and acute, the sides arcuate to the ob- 

 tusely subangulate humeri, which are very narrowly exposed at 

 base, at the middle fully two-fifths wader than the prothorax, the 

 surface with broad and feebly impressed lines throughout the 

 width, very finely but rather closely punctate suturally, more 

 coarsely and densely laterally, confused throughout, without trace- 

 able series ; abdomen finely but strongly, closely punctate medi- 

 ally. Length 8.7-10.7 mm. ; width 3.9-4.9 mm. New Mexico 

 and Kansas cribricoUe n. sp. 



Median impunctate line normal, flat, extending almost to apex and 

 base II 



II — Form broadly fusoid, strongly convex, small in size, not very 

 shining, black with obscure bronzy lustre, WMthout metallic lustre 

 beneath ; hairs borne by the punctures extremely small ; head 

 trapezoidal, densely and deeply, rather coarsely punctured through- 

 out, the antennas stouter than usual, the club broad ; prothorax 

 relatively small, nearly a third wider than long^ the apex three- 

 fourths as wide as the base, with the angles not unusually deflexed, 

 acute but only moderately prominent anteriorly, the basal angles 

 right and not prominent, the sides very evenly and rather strongly 

 arcuate throughout ; surface coarselv, closely punctured through- 

 out except in a limited area behind the middle, where the punc- 

 tures are more scattered, densely crowded laterally ; scutellum but 

 little wider than long; elytra unusually inflated, with strongly and 

 evenly arcuate sides, gradually and arcuately narrowed in apical 

 two- fifths, the humeri obtusely ungulate, very slightly exposed at 



