138 CASEY 



the former only narrowly rounded ; surface finely but distinctly, 

 rather sparsely punctate, becoming more closely and strongly so 

 toward the sides though still not coarsely so, the bead rather fine, 

 straight to the base ; elytra one-half longer than wide, with the 

 sides nearly straight and parallel, rounding gradually behind to the 

 acutely ogival and prominent tip ; surface rather finely, sparsely 

 punctured, nearly smooth, moderately rugose posteriorly; pro- 

 sternum, legs and abdomen nearly as in oblita. Length 10.3 

 mm. ; width 5.2 mm. (?). Utah (southwestern), C. J. Weidt. 



arida n. sp. 



Form stouter and differing greatly in being inflated posteriorly, black, 

 alutaceous, the elytra rather shining; head somewhat coarsely, 

 loosely punctate, the sinus broad, not very deep, parabolic, the 

 lobes broadly rounded, unimpressed, the anterior canthus rounded, 

 coprominent with the posterior ; prothorax three-fourths wider 

 than long, in outline as in the preceding but more strongly nar- 

 rowed at apex, the latter rather more deeply sinuate and barely 

 three-fifths as wide as the base, which is more strongly bisinuate 

 than in arida, with the sides more gradually and feebly oblique ; 

 apical angles but slightly rounded ; surface punctured nearly as in 

 arida but more strongly and more coarsely and much more closely 

 so toward the sides ; scutellum much smaller ; elytra barely a third 

 longer than wide, behind the middle evidently wider than the pro- 

 thorax, the sides broadly rounded, rapidly rounded to the very 

 obtusely subangulate apex; surface nearly smooth, rather finely 

 and closely punctate, densely rugose and more coarsely punctate 

 on the declivity ; prosternum differing greatly, being somewhat 

 coarsely and very closely punctate even on the process, which 

 is shorter and broader, rounded at tip and moderately constricted ; 

 abdomen and hind femora rather finely but strongly, sparsely 

 punctate. Length i i.i mm. ; width 5. 6 mm. ( 9 ). Utah (south- 

 western), C. J. Weidt weidti n. sp. 



ii Form oblong-oval, moderately convex, deep black, rather shining ; 

 head rather strongly, unevenly punctate, the sinus rather broad, not 

 very deep, parabolic, the lobes unusually broadly rounded, unim- 

 pressed, the anterior canthus somewhat oblique and narrowly 

 rounded; prothorax four-fifths wider than long to a little less, the 

 sides converging from the base and feebly arcuate, becoming 

 strongly rounded and converging anteriorly, the apex moderately 

 sinuate, three-fifths as wide as the base, which is very feebly bisin- 

 uate, the angles but slightly produced, the anterior angles de- 

 flexed and moderately rounded ; surface rather strongly and unu- 

 sually closely punctate, becoming decidedly coarsely but not 

 materially more closely so laterally, the bead moderate, straight at 

 base; scutellum well developed; elytra evidently less than one- 

 half longer than wide, as wide as the prothorax, the sides parallel 

 and nearly straight, rather rapidly rounding in apical two-fifths to 

 the moderately obtusely ogival tip ; surface slightly uneven, 

 strongly and somewhat sparsely punctate, rugose posteriorly ; pro- 



