126 Memoirs on the Coleoptera 



squamulose, more distinctly and closely punctured and squamose in what 

 appears to be the male, where also the abdominal base is flattened medially. 

 Length 4.7-5.4 mm.; width 2.7-3.3 mm. Brazil (Chapada — forest). Octo- 

 ber and November. Three specimens tristis n. sp. 



33 — Elytral striae fine but well defined, not at all impressed and finely but very 

 distinctly, remotely punctate 34 



Elytral striae fine, feeble and not well defined, sometimes virtually obsolete and 

 occasionally feebly impressed, the punctulation not so definite as a rule.. 35 



34 — Form rhombic-suboval ; beak slender and smooth, cylindric, moderately 

 arcuate and as long as the elytra, the punctures at the sides basally small 

 and sparse; antennae near two-fifths, slender, piceo-rufous, the first funicular 

 joint not as long as the next two, the second twice as long as wide, the club 

 longer than in the preceding sections, oval, black, longer than the five pre- 

 ceding joints; prothorax one-half wider than long, the strongly arcuate sides 

 subparallel basally, the tubulation minutely, remotely punctulate, nearly 

 three-sevenths as wide as the base, the basal lobe smooth, declivo-sinuate 

 medially at apex, the lateral impressions moderate; scutellum well developed, 

 transversely subquadrate, nearly flat; elytra parabolic, scarcely longer than 

 wide, three-fourths longer than the prothorax, with prominent and strongly 

 rounded humeri, the oblique sides very feebly and broadly sinuate anteriad 

 and posteriad; striae fine but well defined, 1, 2, 9 and 10 more groove-like, 

 not dilated at base, the second not attaining the basal edge; abdomen convex, 

 very minutely, remotely punctulate; femora coarsely, not very closely punc- 

 tate, with small spicules — two on the anterior as usual. Length 4.8 mm.; 

 width 3.1 mm. Brazil (Chapada — campo). December. One female speci- 

 men stibicus n. sp. 



Form stouter, suboval; beak evenly arcuate, nearly as long as the elytra, slender, 

 smooth, the punctulation minute, stronger and irregularly, longitudinally 

 coalescent laterally toward base; antennae just behind the middle, black, the 

 first funicular a little longer than the second, which is as long as the next 

 two, the club narrower, more gradually pointed, a little longer than the 

 preceding four joints; prothorax three-fifths wider than long, the sides 

 more shouldered near the middle than in the preceding, thence very con- 

 verging and broadly arcuate to the tubulation, which is two-fifths as wide 

 as the base, subparallel and straighter in nearly basal half; basal lobe mar- 

 gined, very obtusely rounded; scutellum nearly flat, very short, strongly 

 transverse, subquadrate; elytra scarcely as long as wide, three-fourths 

 longer than the prothorax, the oblique sides feebly arcuate, subsinuate near 

 apical third, the apex narrowly rounded; humeri moderately prominent; 

 striae still finer and not so groove-like as in the preceding, the small punctures 

 evident, rather conspicuous on the flanks; striae 1, 9 and 10 deep and grooved; 

 femoral punctures not so coarse as in the preceding and well separated; 

 male with two moderate erect ante-coxal spines, the deep well in the canal 

 large and oval, the first abdominal segment flattened or feebly concave, 

 strongly and sparsely punctured medially, with a fine impressed median line. 

 Length 4.9 mm.; width 3.35 mm. Brazil (Chapada). March. One male 

 example tenuistriatus n. sp. 



35 — Sides of the prothorax more rapidly rounding medially, thence very oblique 

 — sometimes almost transverse — to the tubulation, parallel in about basal 

 two-fifths 3 6 



Sides more gradually rounding and converging anteriorly 37 



36 — Inferior flanks of the prothorax with very coarse punctures, unevenly dis- 

 tributed; body stout and oblong-oval; beak slender, arcuate, smooth, with 

 moderately coarse, sparse punctures basally, nearly as long as the elytra; 

 antennae very different, black, just behind the middle, the first funicular 



