334 CASEY 



the preceding species ; prothorax four-fifths wider than long, very 

 much narrowed at apex, with the sides subevenly and rather 

 strongly arcuate, widest somewhat behind the middle and broadlv 

 impressed before the basal margin almost throughout the width, the 

 punctures fine and sparse, becoming abruptly coarser, dense and 

 forming long subparallel rugie laterally ; scutellum rather well 

 developed, rounded, transverse, constricted at base ; elytra one- 

 half longer than wide, between three and four times as long as 

 the prothorax, and, toward base, but little wider though distinctly 

 wider and subinflated near apical third, the apex thence obtusely 

 ogival ; punctures only moderately coarse or close-set, perforate, 

 in even unimpressed series, the interstitial punctures feeble and 

 minute, forming irregular single series; abdomen fineh-, feebly 

 rugulose and minutely, sparsely punctate. Length =^.8 mm.; 

 width 3.72 mm. Texas breviusculus n. sp. 



6 — Form very narrow, elongate and but moderately convex, the pro- 

 thorax subparallel, with the apex only just visibly narrower than the 

 base, polished, dai'k testaceous, the elytra finely vittate along the 

 punctured series \yith piceous-black ; under surface and legs still 

 paler, rufous ; head alutaceous, moderately coarsely and not 

 densely punctato-strigose, the sides converging and strongly arcu- 

 ate, the angles very broadly rounded, the feeble emarginations 

 obvious ; prothorax short, four-fifths wider than long, the sides 

 broadly and rather feebly arcuate, the punctures not ^ very fine, 

 deep, rather sparse, becoming somewhat gradually rather coarse, 

 dense and longitudinally plicate toward the sides, the surface im- 

 pressed before the basal lobe; scutellum small, transverse; elytra 

 about two-thirds longer than wide, between three and four times 

 as long as the prothorax and a little wider posteriorly, where they 

 are slightly wider than at base, obtusely ogival at apex, the sides 

 feebly arcuate, the humeri not exposed, the punctures not very 

 coarse but deep, close-set, forming nearly even and barely im- 

 pressed series, the interstitial punctures fine, feeble, forming very 

 uneven single series laterally. Length 5.6-c;,S mm.; width 2.25- 

 2.3 mm. Utah (southwestern) and Nevada (Las Vegas). 



delicatulus n. sp. 



Form somewhat as in delicatuhis but larger and broader, similarly 

 depressed, shining, dark castaneous, the under surface and legs 

 paler, rufous ; head three-fifths to two-thirds as wide as the pro- 

 thorax, moderately coarsely but not very deeply, closely punctate; 

 eyes large, the sides before them converging and arcuate, the 

 emarginations subobsolete, the frontal margin very feebly sinuato- 

 truncate; prothorax two-thirds wider than long, gradually and 

 distinctly narro\yed from base to apex, the sides subevenly and 

 moderately arcuate, the apical angles obtuse and bluntly rounded, 

 the basal right and blunt, the punctures fine and sparse medially, 

 becoming ra]iidly somewhat coarse, dense and coalescent, forming 

 long fine ruga' in lateral fourth; scutellum moderate, transverse; 



