400 Memoirs on the Coleoptera 



beyond the middle to the abrupt constriction, the tubulation parallel, dis- 

 tinctly less than half as wide as the base; surface smooth, very minutely 

 punctulate toward the sides; elytra three-fifths longer than wide, about as 

 wide as the prothorax and two-thirds longer, the sides subparallel, gradually 

 arcuate behind to the rapidly obtusely rounded apex; striae strongly grooved 

 at apex; intervals smooth and flat throughout; squamules of the basal line 

 long, very dense and brownish-white; anterior coxae very remote, the short 

 posterior lobe rectilinearly truncate. Length 7.0 mm.; width 3.0 mm. Peru. 

 One example. subnimius n. sp. 



Body nearly similar in color, lustre, sculpture and general characters, but narrower 

 and with the sides of the elytra more oblique and feebly, evenly arcuate 

 from the moderate humeral swellings to the less broadly rounded obtuse 

 apex; beak ( 9 ) nearly similar but as long as the head and prothorax, and 

 with the abruptly thickened part occupying basal three-sevenths; prothorax 

 nearly a fourth wider than long, the sides feebly converging and very slightly 

 arcuate, gradually rounding beyond the middle — transversely at the abrupt 

 tubulation — nearly as in the precedhag; surface similar; elytra also nearly 

 similar throughout in proportions and sculpture; pygidium a little less flat 

 and more densely punctate. Length 6.4 mm.; width 2.5 mm. Upper 

 Amazon basin (Chanchomayo) elongatus n. sp. 



6 — Form subcuneate-oval, convex, polished and deep black throughout; beak 

 evenly but moderately arcuate, as long as the head and prothorax, cylindric, 

 not very slender and minutely, remotely punctulate, very gradually just 

 visibly thicker and more strongly, closely punctate in nearly basal half; 

 antennae barely visibly behind the middle, black; prothorax a fifth wider 

 than long, the sides feebly, subevenly arcuate, more parallel posteriad, the 

 apical constriction deeply angulate and abrupt, the tubulation three-sevenths 

 as wide as the base; surface remotely, infinitesimally punctulate, more dis- 

 tinctly and in series toward the sides of the apical constriction; elytra two- 

 fifths longer than wide, the sides slightly oblique and nearly straight, arcuate 

 gradually behind to the circularly obtuse apex, barely as wide as the prothorax 

 and three-fifths longer; striae deeply grooved toward apex and also toward 

 the sides, except basally; pygidium rather finely, densely punctate, sub- 

 semicircular and flat, with a feebly tumid median line; femora slender, the 

 anterior legs notably longer than the others, the inferior spicule minute. 

 Length 4.6-4.8 mm.; width 1.8-2.0 mm. Brazil (Santarem). Two speci- 

 mens perlaevis n. sp. 



Form nearly similar but larger in size and with longer legs, polished, black; 

 beak ( 9 ) as long as the head and prothorax, evenly arcuate, rather slender, 

 smooth and cylindric, rapidly thickened and strongly but sparsely punctate 

 behind the antennae, which are at about two-fifths, or (cf) very little shorter 

 and very evenly and slightly tapering from base to apex, minutely, sparsely 

 punctate, gradually a little more strongly but sparsely toward base, the anten- 

 nae well behind the middle, blackish; prothorax convex, only a fifth or sixth 

 wider than long, the parallel and feebly arcuate sides gradually more strongly 

 rounding beyond the middle, the abrupt tubulation half as wide as the base; 

 surface with very minute, sparse punctulation; elytra one-half longer than 

 wide, barely as wide as the prothorax and one-half longer, or less (d*), the 

 oblique sides nearly straight, gradually obtusely rounded behind, the sculp- 

 ture and basal squamulose line nearly as in the preceding; legs longer than 

 in most of the other species, slender, the anterior much longer than the 

 others in both sexes; spicule extremely minute; abdomen with a very feeble 

 medio-basal impression in the male. Length 5.6-6.0 mm.; width 2.3-2.55 

 mm. Brazil (Santarem). Six specimens subtilis n. sp. 



