200 Memoirs on the Coleoptera 



squamules of the upper surface are sparse and diversified in char- 

 acter, those beneath minute and slender throughout, the prothorax 

 feebly tubulate with sparse punctures, and the elytra more or less 

 coarsely, deeply grooved. The species at hand are seven in number, 

 and they pertain to three subgeneric groups as follows: 



Outer funicular joints gradually broader, the outline merging gradually into that 

 of the club, which is oval, pointed and about as long as the preceding three 

 joints; beak long and slender, gradually attenuated laterally and flattened 

 dorsally; pronotum with the median parts minutely, remotely punctate; 

 elytral grooves not half as wide as the intervals I 



Outer funicular joints more feebly enlarged, the oval club abrupt in formation; 

 beak much less elongate, not distinctly flattened distally; pronotum strongly 

 but loosely punctate throughout, the sparse unilineate elytral squamules 

 similarly suberect, the grooves very coarse, not or only slightly narrower 

 than the intervals, which are similarly uniseriately punctate II 



Outer funicular joints and the club nearly as in the last, the beak slender, cylindric 

 and moderately arcuate; pronotum similarly strongly, loosely punctate 

 throughout, the fine squamules more plentiful and even, the squamules of 

 the strial intervals confused, decumbent, even and much more numerous, 

 the grooves scarcely half as wide as the intervals Ill 



I — Form moderately stout, rhombic-oval, polished and piceous, the pronotum 

 blackish; beak ( 9 ) as long as the elytra, finely punctate, remotely so except 

 behind the antennae, where it is slightly inflated; antennae rufo-piceous, 

 behind basal third, the scape rather short; prothorax a third wider than 

 long, the converging sides very feebly arcuate, broadly rounding and con- 

 verging anteriorly to the short, truncate and subobsolete tubulation, which 

 is much less than half as wide as the base; punctures laterally strong and 

 longitudinally confluent and rugulose, remote on the rest of the disk and fine 

 but distinct, mingled with others infinitesimal in size; lobe small, cuspid, 

 with truncate apex; scutellum small, flat, moderately free, smooth, glabrous 

 and quadrate; elytra a fourth longer than wide, parabolic, slightly wider 

 than the prothorax and four-fifths longer, the humeri broadly rounded, not 

 prominent; grooves deep, abrupt, obscurely punctate at the bottom; single 

 interstitial series composed of coarse but shallow, moderately separated 

 punctures, bearing slender sparse suberect and yellowish setiform squamules; 

 under surface rather strongly, sparsely punctate, the inferior flanks of the 

 prothorax smooth, punctured anteriorly. Length 3.8 mm.; width 1.9 mm. 

 Brazil (Santarem). One example serrrilucidus n. sp. 



II — Beak distinctly differing in the sexes, evenly, feebly tapering and not very 

 slender (o 71 ), or slender, cylindric and nearly smooth, and somewhat abruptly 

 and strongly inflated in basal two-fifths ( 9 ); antennae behind the middle.. 2 



Beak almost similar in the sexes, subcylindric and extremely feebly, evenly 

 tapering throughout in both sexes, merely a trifle thicker and less smooth 

 in the male, the basal dividing sulcus deep; antennae somewhat beyond the 

 middle in both sexes 3 



2 — Body not very stout, rhombic-oval, moderately shining, piceous, with blacker 

 pronotum, the upper surface having sparse slender suberect pale yellowish 

 and subuniform squamules throughout, in single lines on the elytra; under 

 surface with minute whitish squamules; beak evenly and moderately arcuate, 

 as long as the head and prothorax (cf ), evidently longer ( 9 ), rather closely 

 but not coarsely punctured basally; antennae slender, rufo-piceous, at three- 

 sevenths (o") or two-fifths (9); prothorax a third wider than long, the 

 converging sides nearly straight to about the middle, thence broadly rounding 



