46 Memoirs on the Coleoptera 



Body notably broader, distinctly rhombiform and larger in size 23 



23 — Thoracic punctules on minute wart-like prominences. Form rhombic; 

 surface smooth, shining, deep black, the pronotum rufous; beak short, two- 

 thirds as long as the prothorax, rather thick, very feebly arcuate, compressed, 

 coarsely, densely sculptured, the punctures rather fine and close above; 

 head sparsely punctate, with a minute fovea midway between the eyes; 

 antennal club rather thin, almost as long as the funicle, very gradually and 

 finely pointed at apex; prothorax but slightly wider than long, the converg- 

 ing sides but little more arcuate anteriorly; basal lobe narrowly rounded, 

 with strong punctures, extending also along the base; scutellum quadrate, 

 nearly smooth, convex; elytra not longer than wide, ogival, with rounded 

 tip and prominent but broadly rounded humeri, nearly a fourth wider than 

 the prothorax; striae extremely fine and subobsolete, the punctures fine and 

 distant; abdominal plaque concave, acutely so behind, strongly, very densely 

 punctate and setulose; hind tibial tooth broad, but with sharp apex. Length 

 6.4 mm.; width 4.5 mm. Brazil (Chapada — campo). October. One male 

 example adulans n. sp. 



Thoracic punctules extremely minute as usual and perfectly simple, the surface 

 smooth 24 



24 — Form moderately narrow, rhombic, smooth, deep black, the pronotum rufous; 

 beak (o 71 ) longer and more finely punctate, compressed and feebly arcuate, 

 rather more than two-thirds as long as the prothorax, the antennal club, less 

 narrow, more rapidly pointed, or ( 9 ) still longer, fully three-fourths as long 

 as the prothorax, somewhat more arcuate, a little less thick and more sparsely 

 punctate, especially toward apex, the frontal fovea larger; prothorax nearly 

 similar but with the sides relatively more arcuate anteriorly; basal lobe, 

 punctures and the scutellum almost similar; elytra distinctly more elongate, 

 more narrowly rounded at tip, cuneiform and with less arcuate sides, the 

 humeri nearly similar, a fourth (d") to fifth ( 9) wider than the prothorax; 

 striae rather fine but much more distinct and impressed, and with the small 

 distant punctures also very distinct; abdominal plaque more evenly concave, 

 less setulose and less densely punctate, absolutely similar in the sexes as 

 usual. Length 6.2-6.7 mm.; width 4.0-4.35 mm. Brazil (Chapada — 

 campo). October. Seven specimens luridicollis n. sp. 



Form stouter, the size a little larger, rhombic, smooth, shining, deep black, with 

 more obscurely rufous pronotum; beak and antennae (d 1 ) nearly similar, 

 the flattened sides of the former more coarsely, densely and confusedly 

 punctate, or ( 9 ) quite different, relatively not so long and but very little 

 longer than in the male, though more arcuate and cylindric than in that sex, 

 the sculpture scarcely less dense; prothorax larger, more nearly as long as 

 wide, the sides more evenly arcuate from base to tubulation; basal lobe 

 similarly punctate, but with the apex not rounded but narrowly sinuate; 

 scutellum quadrate, feebly convex; elytra broader, but little longer than 

 wide, otherwise nearly similar, the striae and punctures also nearly similar, 

 except that the sutural stria i6 relatively coarser; abdominal plaque concave, 

 very densely punctate and setulose; hind tibial tooth more strongly elevated 

 and acute. Length 6.8-7.0 mm.; width 4.65-4.7 mm. Brazil (Chapada — 

 campo). October and November. Three specimens geniculatus n. sp. 



25 — Form rhombic-oval, very convex, highly polished, black, bright testaceous 

 on the inferior flanks and throughout above, excepting the black thoracic 

 apex and scutellum; beak thick, feebly arcuate, compressed, not quite 

 three-fourths as long as the prothorax, strongly, densely punctate at the sides, 

 finely and sparsely above, the head strongly and closely punctate throughout 

 and upon the latero-basal part of the beak; antennal club thick, oval, longer 

 than the funicle; prothorax more than a fourth wider than long, the strongly 



