210 Memoirs on the Coleoptera 



the three preceding joints; prothorax two-fifths wider than long, the frioder- 

 ately converging sides feebly arcuate, more rounding anteriorly, the truncate 

 apex scarcely over two-fifths as wide as the base; punctures sparse, small 

 medially, becoming somewhat coarse but still well separated toward the 

 sides; basal lobe very gradual and broadly rounded, with a very feeble 

 minute sinuation at the middle of the apex; scutellum wider than long, 

 moderately obtrapezoidal; elytra almost evenly parabolic and fully three- 

 sevenths longer than wide, about two and one-half times as long as the 

 prothorax, the humeri scarcely prominent; grooves somewhat coarse, a third 

 as wide as the almost flat and nearly smooth intervals; abdomen very feebly 

 impressed but with notably sparse and fine squamules medio-basally. Length 

 4.6-5.0 mm.; width 2.5-2.8 mm. Brazil (Chapada). March and Novem- 

 ber. On flowers. Three female specimens mera n. sp. 



Body narrower, though not so narrow as in angustior, deep black, sometimes 

 with obscure rufous prothorax and rufo-piceous legs and beak; prothorax 

 relatively not so large, the scales of the sutural interval notably clos^-set 

 throughout the length, sometimes in single line; scales yellowish-white as in 

 the preceding and subsimilarly arranged; beak only moderately thick and 

 almost exactly similar in the sexes, smoother and barely visibly more cylindric 

 distally in the female, equal in length to the head and prothorax (9), or 

 barely shorter (cf); antennae slender, obscure rufous, at four-sevenths (9) 

 or slightly beyond (cf); prothorax rather small, two-fifths wider than long, 

 the arcuate sides parallel at base, only a little more arcuate anteriorly, the 

 truncate apex much less than half as wide as the base, the basal lobe nearly 

 as in the preceding; punctures very fine and remote, with the usual median 

 vacant space, becoming rather coarse but well separated laterally; scutellum 

 slightly transverse, obtrapezoidal; elytra nearly as in the preceding but 

 narrower, slightly less than one-half longer than wide; male abdominal 

 impression similar, deep and very abrupt. Length 3.7-4.5 mm.; width 

 1.7-2.25 mm. Brazil (Chapada). November. On flowers. Six specimens. 



eximia n. sp. 



Bo y narrowly subrhombic-oval, deep black, the surface shining, glabrous above, 

 excepting a cluster of whitish scales occupying the base of intervals two and 

 three, the sutural interval and general surface without trace of the separated 

 scales of the two preceding species; under surface with the broad dense 

 scales whitish; beak (9) nearly as in the preceding, as long as the head 

 and prothorax, the dark rufous antennae medial, long and slender; prothorax 

 two-fifths wider than long, the somewhat strongly converging sides very 

 moderately arcuate, more rounded just behind the short though obvious 

 tubulation, which is truncate and almost half as wide as the base; surface 

 with small but strong, moderately sparse punctures, becoming rather coarse 

 and closer laterally, where there are a very few squamules near the extreme 

 sides, the smooth median line as usual; basal lobe nearly as in the preceding; 

 scutellum flat, scarcely wider than long, with moderately oblique sides; 

 elytra in form nearly as in the preceding, but with the grooves not quite so 

 coarse. Length 3.85 mm.; width 2.15 mm. Brazil (Chapada). March. 

 One female specimen inanis n. sp. 



8 — Form rather stout, rhombic-suboval, deep black and shining, the upper 

 surface entirely glabrous, excepting a cluster of white scales at the base of 

 the third strial interval, the very sparse squamules of the under surface 

 white, dense on the abdomen posteriorly; beak (cf ) only moderately thick 

 and arcuate, sculptured nearly as in the preceding group, very slightly and 

 evenly tapering from base to apex and as long as the head and prothorax, 

 the antennae medial, piceo-rufous, not quite so long as in the preceding group 

 and with the second and third joints relatively less elongate, the club narrowly 



