74 Memoirs on the Coleoptera 



much smaller and less prominent. Length 1.9 mm.; width 1.15 mm. Brazil 



(Santarem). One specimen speculum n. sp. 



Outline more elongate and less regularly oval than in conjux, the feeble subapical 

 elytral prominences giving a more subtruncate disk when viewed antero- 

 posteriad, black, highly polished, the prothorax obscure rufous above; beak 

 thick, feebly arcuate, subcylindric, three-fourths as long as the prothorax, 

 very finely, not densely punctate; antennal club not very slender, as long as 

 the preceding six joints; prothorax barely wider than long, the sides less than 

 usually converging from the base, broadly arcuate, gradually slightly more 

 so beyond the middle, the scarcely tubulate apex wider than usual, fully half 

 as wide as the base; rather coarse sparse punctures extend throughout the 

 lower part of the inferior flanks; basal lobe moderate, evenly rounded, nearly 

 smooth; scutellum minute, subquadrate, feebly, medially impressed; elytra 

 a fifth wider than the prothorax and fully a fourth longer than wide, with 

 slightly prominent humeri, ogival, with narrowly rounded tip; discal striae 

 obsolescent, 1, 9 and 10 deep but not very coarse, 9 obsolescent in basal two- 

 fifths; first ventral slightly swollen, coarsely, closely punctate; femora not 

 spiculate beneath, the tibiae rather slender, flattened and feebly fluted, 

 obliquely and narrowly truncate at base, the external angle obtuse but sharp, 

 not at all prominent. Length 2.2 mm.; width 1.18 mm. Brazil (Chapada). 



March. One example docilis n. sp. 



5 — Upper surface not evidently bicolored 6 



Upper surface more or less distinctly bicolored 8 



6 — Body piceo-rufous throughout, the legs and beak darker, nearly black. Form 

 broader, oval; beak rather slender, uniformly cylindric, feebly arcuate, 

 three-fourths as long as the prothorax, finely, rather closely punctate, the 

 antennal club oval, as long as the preceding six joints; prothorax a fifth 

 wider than long, the converging sides moderately and subevenly arcuate to 

 the feebly constricted apex, which is barely two-fifths as wide as the base; 

 surface with minute and sparse punctures at the sides, which become strong 

 and rather dense throughout the inferior flanks; basal lobe moderate, evenly 

 rounded, with numerous moderate punctures; scutellum minute, quadrate, 

 impressed; elytra barely at all longer than wide, obtusely and evenly oval, 

 scarcely a fifth wider than the prothorax, the humeri very broadly rounded; 

 striae fine, becoming obsolescent but more punctate laterad, the two lateral 

 moderately coarse and catenulate; legs strongly punctured; hind tibiae 

 with the external tooth high and acute. Length 2.0 mm.; width 1.4 mm. 



Brazil (Chapada). March. One specimen piceolus n. sp. 



Body black throughout, the elytra very faintly picescent, subrhombic-oval; beak 

 thick, arcuate and compressed, slightly shorter than the prothorax, shining, 

 finely, sparsely punctate, the reentrant angle at the base distinct; prothorax 

 slightly shorter than wide, the converging sides nearly straight to a little 

 beyond the middle, becoming gradually and feebly arcuate anteriorly, the 

 feebly constricted apex less than half as wide as the base; surface finely, 

 remotely punctulate, but little more evidently so toward the sides, rather 

 strongly but loosely on the inferior flanks; basal lobe moderate, feebly sinu- 

 ato-truncate medially at tip; scutellum small, quadrate and flat; elytra 

 parabolic, but with rather feebly arcuate oblique sides, a fifth longer than 

 wide, nearly a fourth wider than the prothorax, with rather evidently prom- 

 inent humeri; striae toward the suture fine but distinct, subobliterated 

 elsewhere, 9 and 10 rather coarse, catenulate; hind tibiae with the external 

 angle at base sharp and slightly prominent. Length 2.1 mm.; width 1.35 



mm. Brazil (Santarem). One specimen serenus n. sp. 



Body black throughout, or with the pronotum barely visibly piceous in tinge.. 7 

 7 — Form much more narrowly and more rhombic oval, deep black and very 



