Brazilian Barinve 203 



Centrinites Csy. 



In this genus the feebly subrhombic-oval body is densely sculp- 

 tured, clothed with irregularly distributed narrow squamules and 

 has a somewhat opaque surface. The beak differs but little in the 

 sexes and is only moderately slender, distinctly arcuate, subcylin- 

 dric, closely sculptured at the sides and separated from the head 

 by a rather shallow reentrant angle. The mandibles are denticulate 

 within but non-decussate and are prominent when closed. The 

 presternum is shallowly and indefinitely impressed, the coxae 

 moderately separated and two short erect ante-coxal spines may 

 or may not be evident in the male, separated by a rather deep 

 cavity. The pronotum has a dense system of longitudinal and 

 more or less anastomosing rugae, the prothorax more or less tubu- 

 late at apex, the scutellum quadrate, slightly transverse, sinuate 

 behind and more or less squamulose, and the elytral striae are 

 groove-like, with closely and as a rule confusedly punctate intervals. 

 There seems to be no structural difference whatever between the 

 nearctic type, strigicollis, and the Brazilian forms here described, 

 but the outline of the northern species is more elongate. There 

 are five neotropic species at hand as follows: 



Elytral grooves very coarse, even noticeably more so than in strigicollis. Almost 

 evenly oval, convex and pale piceous-brown, feebly shining, the slender 

 yellowish pronotal squamules very sparse and evenly distributed, closer at 

 the sides of the base and along the median line basally, those of the elytra 

 larger, in single interstitial lines and, in part, herissate, small and sparse but 

 distinct throughout the under surface and basal parts of the beak, which is 

 strongly arcuate and not quite half as long as the body, the antennae medial, 

 the first funicular joint about as long as the next three and the oval club 

 abrupt, as in the other species; prothorax two-fifths wider than long, the 

 sides converging and nearly straight, broadly rounding beyond the middle, 

 the truncate tubulation scarcely half as wide as the base; longitudinal ruga? 

 coarser than in the following species, the basal lobe small and narrowly 

 rounded; scutellum obtrapezoidal, deeply sinuate and impressed at apex, 

 shining and glabrous, the lateral slopes basally with a few minute squamules; 

 elytra evenly parabolic, a fourth longer than wide, evidently wider than the 

 prothorax and twice as long; grooves as wide as the intervals to slightly 

 narrower, the strong punctures bearing small squamules; intervals flat, each 

 with a single series of very coarse and almost contiguous punctures; under 

 surface strongly, closely punctate. Length 2.75 mm.; width 1.35 mm. 

 Brazil (Chapada — forest). October. One specimen separatus n. sp. 



Elytral grooves much narrower, indistinctly punctate and only a third or fourth 

 as wide as the intervals, which are very moderately but densely and con- 

 fusedly punctate; pronotal rugae dense and notably fine 2 



2 — Prothorax conical, the sides broadly and very feebly arcuate medially. Body 

 rather narrowly rhombic-oval, not at all shining, piceous; squamules de- 

 cumbent, abruptly dense at the sides of the pronotum and loosely aggregated 

 on the elytra internally toward base, also in a few small scattered spots, the 

 one on the humeri and on the basal thoracic lobe denser, the whitish squam- 

 ules of the under surface close, sparse on the metasternum; beak (o 71 ) rather. 



