450 Memoirs on the Coleoptera 



very feeble and scarcely less squamose medio-basal impression. 

 Length (o^ 9 ) 3-5-3-6 mm.; width 1.5 mm. Colorado (Holly). 



montanus n. sp. 



Body nearly similar but stouter and with relatively larger prothorax, 

 almost similar in coloration and vestiture; beak in the male similar 

 but a trifle stouter and more coarsely, deeply sulcate at the sides, 

 as long as the head and prothorax; antennae inserted just behind 

 apical third; prothorax a fourth wider than long, the broadly 

 rounded sides becoming parallel more basally; apex similarly un- 

 constricted and about half as wide as the base; basal lobe relatively 

 smaller; punctures rather coarse, clearly but narrowly and un- 

 equally separated, the smooth median line even and entire; elytra 

 similar in form and parabolic, but shorter, only two-fifths longer 

 than wide in the male and much less conspicuously broader than 

 the prothorax, not quite three-fourths longer; striae rather coarse, 

 similar but with the punctures along the bottom much more distinct; 

 intervals of different widths, flat, with single, the second, third and 

 fifth with irregularly double, lines, of distinct elongate squamules; 

 male abdomen nearly similar. Length (cf) 3.6-3.8 mm.; width 

 1. 6-1. 75 mm. Iowa (Riverton) and Texas vacunalis n. sp. 



14 — Form narrow, subparallel, convex, rather shining, black, the femora 

 feebly rufescent; squamules of the upper surface small, grayish, very 

 slender, sparse and rather inconspicuous, very uniform in distri- 

 bution on the pronotum, forming single or partially double lines on 

 the elytra, the scutellum and basal thoracic lobe densely albido- 

 squamose; white squamules of the under surface parallel-sided and 

 more or less distinctly separated; beak in the male evenly, moder- 

 ately arcuate, rather thick, cylindric and dull, somewhat strongly 

 sculptured as usual, the antennae at about three-fifths; prothorax 

 about as long as wide, the sides feebly converging and nearly straight, 

 gently rounding in about apical third, the apex unconstricted and 

 much more than half as wide as the base; punctures coarse, narrowly 

 separated, the smooth line narrow and not well defined; elytra not 

 quite one-half longer than wide, at the feebly prominent humeri 

 distinctly wider than the prothorax, twice as long, the sides parallel 

 and nearly straight, parabolically rounding in apical third; striae 

 moderate; intervals sparsely punctulate and fully twice as wide as 

 the striae; male abdomen broadly, feebly impressed basally. Length 

 (cf ) 2.2 mm.; width 0.75 mm. Guatemala (locality unrecorded). 



*cylindricollis n. sp. 



Form more dilated, less parallel, moderately convex, black, the legs 

 bright rufous; squamules above slender and rather sparse but 

 whitish, glistening and distinct, somewhat aggregated along the 

 sides of the pronotum and loosely so on the basal lobe, elsewhere 

 indistinct; on the elytra they form single interstitial lines, which 

 are conspicuous; scutellum small, densely albido-squamose; white 

 scales beneath narrowly separated; beak in the male feebly arcuate, 

 rather thick, strongly sculptured and not quite as long as the head 

 and prothorax, the antennae at four-sevenths; prothorax very slightly 

 wider than long, the sides subparallel and nearly straight in about 



