302 CASEY 



converging and strongly arcuate, becoming subparallel near the 

 eyes, the punctures coarse, irregular, more or less dense, the 

 occipital spot uneven and ill-defined ; prothorax short, fully 

 four-fifths wider than long, wildest from, a little behind to before 

 the middle, the sides moderately arcuate, more converging and 

 sometimes straighter anteriorly, the basal angles obtuse, not blunt 

 or prominent, the punctures sparse and moderately coarse, be- 

 coming rather rapidly dense and coarser in about lateral fifth ; 

 scutellum rather small ; elytra a little more than one-half longer 

 than wide, very distinctly wider than the pi'othorax and about 

 three and one-half times as long, obtusely ogival at tip, the sides 

 rounded toward the humeri, punctured nearly as in hebes^ the 

 abdomen finely, sparsely punctured medially. Length 6.8-6.9 

 mm.; width 3.7-3.8 mm. Arizona rufescens n. sp. 



33 — Base of the prothorax rather distinctly narrower than the base of 



the elytra; scutellum rather well developed, transverse 24 



Base of the prothorax equal in width to the base of the elytra 25 



24 — Form oblong, rather convex, shining, the elytra scarcely at all 

 alutaceous at tip, dark castaneous in color, the legs rufous ; head 

 short, strongly but not densely punctate, with a large ill-defined 

 occipital impunctate area, the sides converging and feebly arcuate 

 before the eyes to the broadly rounded angles ; prothorax about 

 three-fourths wider than long, widest at the middle, the sides 

 rather strongly, subevenly arcuate, the apex only very slightly 

 narrower than the base ; punctures strong but rather sparse, very 

 gradually and slightly coarser, close and longitudinally confluent 

 toward the sides; scutellum polished, with a few fine punctures 

 at base only ; elytra rather less than one-half longer than wide, 

 with series of rather coarse punctures toward the sides, the 

 interstitial series similar but rather less approximately punctate; 

 abdomen finely but strongly, somewhat sparsely punctured me- 

 dially. Length 6.8 mm. ; width 3.0 mm. Texas (near El Paso). 



congener Csy. 



Form somewhat similar but smaller and less coarsely sculptured, pol- 

 ished, pale testaceous, the abdomen darker except at tip ; head 

 relatively rather finely and loosely punctate, without vestige of 

 an impunctate occipital area, the sides before the eyes converging 

 and evenly, strongly arcuate throughout; prothorax smaller than 

 usual, almost twice as wide as long, rather finely, sparsely punc- 

 tate, becoming somewhat abruptly coarsely and confluently so in 

 about lateral fourth, except close to the margin, where the coarse 

 punctures are simply contiguous, the sides evenly, strongly arcuate, 

 the apex distinctly narrower than the base; scutellum impunctate, 

 polished ; elytra one-half longer than wide, with series of moder- 

 ately coarse punctures rather well separated, those of the inter- 

 stitial series nearly similar. Length 6.0 mm. ; width 2.8 mm. 

 Texas (El Paso) politum Csy. 



25 — Body more or less pale testaceous in color throughout 26 



