BARiN.ii; 419 



lobe larger, almost a third the total width; punctures moderate, 

 very dense, the smooth median line not evident; elytra with more 

 converging arcuate sides and less obtuse rounded apex, at the rather 

 more prominent humeri much wider than the prothorax, three- 

 fourths longer; striae decidedly coarser, the closely and confusedly 

 punctate intervals slightly more than twice as wide as the stride and 

 subequal in width among themselves. Length (9 ) 4.7 mm.; width 

 2.2 mm. Colorado (locality unrecorded) densissimus n. sp. 



4 — Sides of the prothorax regularly arcuate, gradually less so and sub- 

 parallel in about basal half 5 



Sides subparallel and very feebly arcuate, rounding only in about apical 

 third 6 



5 — Form oblong-suboval, stout, closely clothed above with white scales, 

 smaller and more slender and less dense on the pronotum, except at 

 apex and as usual on the basal lobe, larger, broad and dense on the 

 strial intervals, dense and white on the under surface; beak in the 

 female smooth, feebly tapering, slightly arcuate, subevenly more 

 arcuate in about basal half, a little less than half as long as the 

 body, the antennae inserted submedially, the first two funicular 

 joints elongate, the first less so than in the two preceding but as 

 long as the next two together; prothorax one-half wider than long; 

 apex barely at all constricted, not quite half as wide as the base, 

 the basal lobe a fourth the total width; punctures moderate, dense, 

 though slightly separated medially, without smooth line; elytra 

 very obtusely parabolic, at the moderate humeral prominences only 

 just visibly wider than the prothorax, three-fourths longer; striae 

 deep, the squamules inconspicuous; intervals confusedly punctate, 

 three or four times as wide as the striae. Length (9) 4.5 mm.; 

 width 2.1 mm. Dakota (locality unrecorded) dakotanus n. sp. 



Form narrower, relatively somewhat more elongate, black, the tibiae 

 rufescent; upper surface clothed densely with uniform ochreous 

 scales, which are nearly as wide on the pronotum as on the strial 

 intervals, but not quite so dense; beak in the female arcuate, smooth, 

 feebly tapering, nearly as in the preceding but more abruptly bent 

 at the immediate base, the antennae nearly similar and inserted just 

 visibly beyond the middle; prothorax somewhat less than one-half 

 wider than long, deeply, moderately and very closely punctate, 

 sometimes with a median smooth line centrally; apex half as wide 

 as the base, the basal lobe rather more than a fourth the total width; 

 elytra obtusely parabolic, at the feebly prominent humeri barely 

 visibly wider than the prothorax, three-fourths to four-fifths longer; 

 striae deep and abrupt, with minute and remote squamules, the 

 intervals densely punctured and squamose, three or four times as 

 wide as the striae, the scales uniform. Length (9) 4.3-4.6 mm.; 

 width 1.8-2.0 mm. Colorado (locality unrecorded). Three ex- 

 amples ochreosus n. sp. 



Form still narrower and even more cuneiform posteriorly, the upper 

 surface clothed with white scales, more slender and less dense than 

 in ochreosus and not broadly dense and confused on the strial 

 intervals as in the preceding, but evidently separated, although very 



