282 Memoirs on the Coleoptera 



Pronotum never with distinctly denned squamulose vittae, the squamules some- 

 times gradually closer toward the sides however 7 



2 — Lateral vittae composed, at least in part, of larger, dense and conspicuous 

 squamules; interstitial series nearly always more or less abbreviated 3 



Lateral vittae composed of slender, equal and well separated squamules through- 

 out; interstitial series entire; body smaller and more slender 6 



3 — Lateral vittse broad and conspicuous, composed throughout of dense and 

 moderately narrow scales 4 



Lateral vittse only dense toward base, obliterated or loose anteriorly 5 



4 — Body moderately narrow and oval, with slightly prominent humeri, black 

 throughout, dense scales at the sides of the pronotum and on its inferior 

 flanks, also on the mesosternal sides and met-episterna, pale orange, else- 

 where white, the pronotal sides with a small denuded medial spot, the median 

 vitta loose and narrow; interstitial series denuded at the sides and apex, 

 the scales dense throughout beneath; beak (o 71 ) rather thick, feebly arcuate, 

 almost as long as the head and prothorax, moderately sculptured and squam- 

 ulose; antennae piceo-rufous, at three-fifths; prothorax only a fifth or sixth 

 wider than long, the sides just visibly converging and straight, gradually 

 rounding and oblique in apical third, the truncate apex rather more than 

 half as wide as the base; punctures strong, deep and very close but not 

 crowded; scutellum arcuate at the sides and pointed, ogival, as long as wide, 

 closely albido-squamose; elytra elongate-oval, with rather obtuse apex, 

 distinctly wider than the prothorax and twice as long, almost one-half longer 

 than wide; grooves fully half as wide as the intervals— uniseriate with 

 rather coarse and close punctures; male abdomen feebly impressed and less 

 squamose medially toward base. Length 3.0 mm.; width 1.28 mm. Brazil 

 (Santarem). One specimen amazonicus n. sp. 



Body evidently stouter, similar in coloration, sculpture and vestiture throughout, 

 except that the lateral pronotal scales are a little larger and not quite so 

 dense, the squamules of the elytra coarser and less close-set in the series, 

 the latter more broadly denuded at the sides and for a greater distance along 

 the suture from the apex, also basally outside the sutural interval; beak (o 71 ) 

 somewhat shorter and thicker, with the longitudinal sculpture at the sides 

 evident, only about as long as the prothorax, or ( 9 ) much longer and a little 

 thinner, only slightly less sculptured, more arcuate and longer than the head 

 and prothorax; antennae piceo-rufous, submedial ( 9 ), at four-sevenths (o 71 ); 

 prothorax nearly as in amazonicus throughout; scutellum more quadrate, 

 obtuse behind; elytra scarcely more than a third longer than wide and not 

 quite twice as long as the prothorax; grooves not quite so coarse, the inter- 

 stitial series composed of less coarse punctures, tending somewhat to con- 

 fusion on the third; male abdomen similarly very densely squamose, with 

 very slight medio-basal modification. Length 2.6-3.2 mm.; width 1.15-1.5 

 mm. Brazil (Chapada — forest). November. Three specimens. 



ornatus n. sp. 



Body more elongate than in ornatus, nearly similar in color, sculpture and vesti- 

 ture, except that the white elytral series of squamules are less interrupted 

 toward base internally; beak (c 71 ) longer, thick, shining though longitudinally 

 sculptured, as long as the head and prothorax, or ( 9 ) shorter, thinner and 

 more tapering than in the same sex of ornatus, about as long as the head 

 and prothorax; antennae piceous, medial ( 9 ) or well beyond (o 71 ); prothorax 

 less abbreviated, but little shorter than wide, the sides feebly converging 

 and broadly, subevenly arcuate from base to apex, not subparallel toward 

 base as in ornatus; elytra longer, about twice as long as the prothorax, 

 similarly sculptured; abdomen with a rather distinct and slightly less 

 squamose medio-basal impression. Length 2.7-3.2 mm.; width 1.15-1.4 

 mm. Brazil (Chapada — forest). March and November. Four specimens. 



medialis n. sp. 



