50 MEMOIRS ON THE COLEOPTERA 



sides; sterna of normal form Length 1.6-1.85 mm.; width 0.8-1.0 

 mm. New Mexico (Fort Wingate). Seven examples. 



irregularis n. sp. 



Elytra smooth throughout, never sculptured reticularly, except sometimes 

 very obsoletely at the extreme tip 1 1 



ii Color pale ochreo-testaceous throughout above and beneath. 

 Surface polished, the elytra not at all reticulate, broadly oval, 

 strongly convex, broadly obtuse behind; head well developed, fully 

 half as wide as the prothorax, finely, sparsely punctulate, the front 

 broadly trapezoidal; antennae moderate though with unusually long 

 third joint, this being slightly longer than the next two combined; 

 prothorax distinctly more than twice as wide as long, two-fifths as 

 long as the elytra, the evenly converging sides feebly arcuate, the 

 basal bead strongly marked; scutellum broadly ogival; elytra slightly 

 elongate, parallel, circularly rounded in apical half, the punctures of 

 the series minute but visible to the base; middle and hind femora 

 broad; hind tibial spurs very stout. Length 1.8-2.2 mm.; width 

 1.15-1.35 mm. New Mexico (Albuquerque), Wickham. 



blanditus n. sp. 



Color similarly very pale flavo-testaceous throughout. Form very 

 narrow and elongate, shining, without trace of ground sculpture; 

 head rather more than half as wide as the prothorax, less transverse 

 than usual and with the upper surface flatter, the produced frontal 

 margin broad; antennae slender, of the usual structure; prothorax 

 scarcely more than twice as wide as long, the sides only moderately 

 converging and rather feebly arcuate; basal margination distinct; scu- 

 tellum slightly wider than long, ogival; elytra elongate, nearly one- 

 half longer than wide and three times as long as the prothorax, the 

 sides subparallel and broadly arcuate, becoming gradually narrowly 

 parabolic in about apical half, the two striae distinct; punctures of 

 the series very small, but each lies within an areola apparently caused 

 by the transparency of the integument; metasternal process rather 

 wide, arcuate at apex, the mesosternum forming a thick apical bead; 

 posterior tarsi unusually long, fully as long as the tibiae, the joints 

 proportioned as usual. Length 1.5-1.6 mm.; width 0.63-0.75 mm. 

 Utah (southwestern), Weidt. Two examples aridus n. sp. 



Color piceous to black above 12 



12 Series of elytral punctures extending to the base, although often 

 excessively fine 13 



Series gradually obsolete basally 14 



13 Form oblong-oval, moderately convex, highly polished throughout, 

 pale piceous-brown in color, the under surface and legs slightly 

 paler and more ferruginous; head scarcely half as wide as the pro- 

 thorax, very minutely and sparsely punctulate, the front broadly 

 trapeziform; antennae as usual; prothorax only about twice as wide 

 as long, the moderately converging sides rather strongly arcuate, the 

 basal bead evident though not strongly developed; scutellum trans- 

 verse, obtusely ogival; elytra slightly elongate, scarcely two and one- 

 half times as long as the prothorax, parallel, rather rapidly parabolic 

 in apical half, not reticulate even at apex, the surface smooth, the 



