284 Memoirs on the Coleoptera 



Body narrowly suboval, deep black, with rufous legs; surface shining; vestiture 

 white, the larger scales of the under surface very dense throughout; scanty 

 and slender squamules of the median pronotal vitta extending transversely 

 across a distinct impunctate line, the lateral vittae broader, abruptly limited 

 internally, though very loose; strial intervals each with a single slender 

 series; beak (cf) rather thick, even, feebly arcuate, somewhat compressed, 

 distinctly sculptured and as long as the head and prothorax; antennae at 

 four-sevenths, obscure rufous; prothorax nearly as long as wide, the feebly 

 converging sides straight, gradually rounding in about apical third, the 

 truncate apex more than half as wide as the base; punctures strong, separated 

 by not quite their own widths; scutellum densely albido-squamose; elytra 

 fully a third longer than wide, distinctly wider than the prothorax and 

 scarcely twice as long, the humeri less prominent and the sides less oblique 

 and less arcuate than in the preceding, the obtusely rounded apex broader; 

 sculpture almost similar; male abdomen with a distinct medial impression 

 toward base and rather less squamose than the rest of the surface. Length 

 2.25 mm.; width 0.9 mm. Brazil (Chapada — forest). November. One 

 specimen serenus n. sp. 



7 — Pronotum distinctly though loosely squamulose, the squamules gradually 

 denser and somewhat coarser broadly toward the sides, the median vitta 

 not obvious, except toward base 8 



Pronotum evenly and loosely squamulose throughout 9 



8 — Body narrowly suboval, black, with dark rufous legs; vestiture conspicuous, 

 white, the moderate scales confused on all the strial intervals, very dense 

 throughout beneath, the quadrate scutellum very densely squamose; beak 

 (o 71 ) thick, arcuate, strongly sculptured and squamulose, rufescent at tip, not 

 separated from the head and barely as long as the head and prothorax, or 

 (9) a little longer and thinner; antennae rufous, medial ( 9 ) or inserted 

 beyond the middle (o 71 ); prothorax about as long as wide, the sides as in 

 the preceding; punctures rather strong and very close, but with shining 

 interspaces, without smooth median line; elytra elliptic, nearly a third longer 

 than wide, distinctly wider than the prothorax and about twice as long, the 

 humeri slightly prominent; sides moderately oblique and arcuate; grooves 

 moderate, the interstitial punctures moderate, not very dense; abdomen (cf ) 

 scarcely at all modified, very densely squamose throughout. Length 2.25- 

 2.65 mm.; width 1.15-1.22 mm. Brazil (Chapada — forest). March and 

 November. Fifteen specimens chapadanus n. sp. 



Body still narrower, smaller in size, piceo-rufous, the legs brighter rufous; vesti- 

 ture of the same general character as in the preceding, but much less dense, 

 especially on the elytra, where the strial intervals have one or two irregular 

 series; scales beneath not quite so large or dense as in the preceding; beak ( cf) 

 less thick, rufescent, less arcuate, not quite so closely sculptured and barely 

 longer than the prothorax, the rufous antennae distinctly beyond the middle; 

 prothorax in outline as in chapadanus, but rather less strongly punctured 

 and with a partial impunctate median line; scutellum nearly similar; elytra 

 elongate-elliptic, very much narrower, nearly one-half longer than wide, 

 only a little wider than the prothorax and twice as long; grooves similar, 

 the interstitial punctures moderate and loosely set; male abdomen with the 

 feeblest trace of medio-basal impression. Length 1.9-2.2 mm.; width 0.75- 

 0.8 mm. Brazil (Chapada — forest). November. Three male examples. 



silvestris n. sp. 



9 — Elytral grooves strongly punctured along the bottom, more than half as wide 

 as the intervals, the uniseriate punctures of which are rather small and well 

 separated; beak in the type very short, slender and cylindric, very much 

 shorter than the prothorax, the antennae well beyond the middle; prothorax 



