202 Memoirs on the Coleoptera 



impunctate median line somewhat narrower; basal cuspidiform lobe some- 

 what more rapidly formed; scutellum fully as wide as long, slightly more 

 obtrapezoidal in form; elytra nearly similar in form and sculpture, but only 

 about a fourth wider than the prothorax and barely twice as long; intervals 

 as wide as the strongly punctate grooves, the single series of interstitial 

 punctures coarser, the long suberect squamules whiter, more uniform and 

 more conspicuous; punctures and small whitish squamules of the under 

 surface subsimilar. Length 3.0-3.6 mm.; width 1. 35-1 .65 mm. Brazil 

 (Chapada). Found at the same time and place as the preceding species. 

 Seven specimens sulcatulus n. sp. 



Body much smaller than in either of the two preceding species and still narrower, 

 with relatively smaller prothorax, red-brown in color and moderately shining; 

 beak and antennae nearly as in the two preceding but with the former rufo- 

 piceous and not black; prothorax a third wider than long, the feebly con- 

 verging sides nearly straight in about three-fifths, thence gradually rounding 

 and converging to the distinct tubulation, which is fully half as wide as the 

 base; sparse, coarse punctures and scanty slender squamules nearly as in 

 the preceding species, but with fewer or no admixed and less coarse punctures 

 medially, the smooth line similar; scutellum smooth, obtrapezoidal and 

 slightly impressed; elytra narrower, nearly a third longer than wide and 

 much more than twice as long as the prothorax, less evenly parabolic, the 

 sides straighter and less converging to well behind the middle, there becoming 

 more oblique and nearly straight to the rounded apex; sculpture and pale 

 uniform suberect squamules nearly as in sulcatulus, except that the grooves 

 are less coarse and very much narrower than the intervals; under surface 

 nearly similar but red-brown. Length 2.3-2.65 mm.; width 1. 0-1.25 mm. 

 Brazil (Chapada — forest). Four specimens parvulicollis n. sp. 



Ill — Form more oblong-oval and less shining, more alutaceous, black throughout; 

 slender squamules above and beneath much more numerous and evenly 

 distributed, conspicuous, confused and decumbent on the strial intervals; 

 beak very slender, cylindric, nearly smooth, evenly and rather strongly 

 arcuate, distinctly longer than the head and prothorax and differing very 

 little in the sexes, feebly thickened, closely punctate and squamulose near 

 the extreme base; antennas very slender and slightly behind the middle; 

 prothorax feebly convex in lateral profile, as in the other species, scarcely a 

 third (c?) to two-fifths ( 9) wider than long, the sides parallel and feebly 

 arcuate in about basal half, thence rounding and converging to the obsolete 

 apical constriction, the truncate apex fully half as wide as the base; punc- 

 tures moderately coarse, deep, separated by somewhat more than their 

 diameters, a little closer laterally, not mingled with smaller punctures and 

 with a median smooth line, not attaining base or apex; basal lobe short, 

 gradual and obtusely cuspidiform; scutellum longer than wide, flat and 

 obtrapezoidal, feebly squamulose; elytra less (9) to more (cf) than a 

 fourth longer than wide, the sides feebly oblique and broadly arcuate, the 

 apex rather broadly, obtusely rounded, distinctly wider than the prothorax 

 and not quite twice as long; grooves moderate, shallower than in any of the 

 preceding and catenulate, less than half as wide as the intervals, which are 

 distinctly but loosely, confusedly, sometimes unevenly uniseriately punctate. 

 Length 3.1-3.4 mm.; width 1. 5-1 .65 mm. Brazil (Chapada — forest). Six 

 specimens rusticus n. sp. 



There are probably many other species of this genus, which is 

 one of the characteristic neotropical flower- frequenting types of 

 the smaller Centrinini. 



