Brazilian Barin/e 157 



3 — Body slightly larger and more oblong-oval, deep black and shining; beak (cf ) 

 rather thick and very moderately arcuate, about as long as fhe head and 

 prothorax, strongly sculptured, with deep reentrant angle at base, the 

 longitudinal channel at the side beyond the antennae long, deep and con- 

 spicuous, the upper surface with many deep sulci apically; antennae nearly 

 as in the two preceding; prothorax two-fifths wider than long, the con- 

 verging sides rather strongly, subevenly arcuate from base to a somewhat 

 more evident apical constriction, the truncate apex almost half as wide as 

 the base; punctures strong and somewhat well separated, less coarse but 

 very conspicuous medially and basally, with a partial smooth median line; 

 basal lobe and scutellum almost similar; elytra evenly and obtusely elliptic, 

 a fourth longer than wide, very little wider than the prothorax and about 

 twice as long, the humeri but just visibly prominent; grooves sharply defined, 

 deep and feebly punctate along the bottom; intervals flat, with single series 

 of minute but distinct, less approximate punctures, the squamules more 

 regular and uniform, without admixture of longer and whiter ones posteriorly, 

 as in the two preceding: under surface strongly and closely punctate, less so 

 on the abdomen; legs rather short. Length 2.75 mm.; width 1.35 mm. 

 Brazil (Santarem). One male example separata n. sp. 



In the oval outline of the body, these species are suggestive of 

 Stethobaris, but there is no real affinity in any way. 



Roalius n. gen. 



The single minute species forming the type of this genus, is 

 entirely exceptional in the present section of the tribe Centrinini, 

 in having the .anterior coxae virtually contiguous and the femora 

 armed beneath with a small denticle, somewhat as in the Diastethus 

 group of very much larger glabrous forms. The body in Roalius 

 is plentifully clothed with squamules, the beak rather long and 

 slender, the mandibles deeply bifid, the inner tooth very acute, the 

 antennas long, slender and medial, with all the funicular joints more 

 or less elongate, the first two notably so and equal in length, but 

 with the first much inflated, the club oval, gradually pointed, with 

 somewhat feeble sutures, and about as long as the four preceding 

 joints. The prosternum is deeply sulcate, the channel abruptly 

 defined but densely squamose throughout, the femora feebly in- 

 flated, the tibiae evenly arcuate externally toward base, the tarsi 

 rather narrow, with the third joint but slightly inflated and the 

 claws small and basally connate. The prothorax is not tubulate 

 at apex, and the scutellum is well developed, somewhat rounded 

 behind, a little wider than long and densely squamose. The type 

 is as follows : 



Roalius rufipes n. sp. — Somewhat narrowly subrhombic-oval, convex, piceous- 

 black, the legs rather long and rufous; beak (d 1 ) not quite half as long as the 

 body, slender, evenly and moderately arcuate, sparsely sculptured, with a few 

 squamules at the sides basally, and not separated from the front by even a vestige 

 of impression; it is rather piceous in color, the long slender antennae pale rufous 

 throughout, the club not darker; prothorax a fourth wider than long, the moder- 



