182 Memoirs on the Coleoptera 



flexed, ante-coxal processes extending far beyond the head and separa- 

 ted by a large, transversely oval and very deep pit. The descrip- 

 tions follow: 



Body stout and convex, rhombic-oval, dull from density of sculpture and some- 

 what piceous-black in color; setiform erect squamules of the pronotum dark 

 and sparse, with a few that are pale near the hind angles, those of the elytra 

 small and dark, irregular and sparse, with a loose series of longer bristling 

 pale squamules on parts of each interval; punctures of the more shining 

 under surface having very minute and barely visible squamules, longer and 

 more distinct on the legs; beak more than half as long as the body, evenly 

 and strongly arcuate (d"), or more arcuate basally (9), with close longi- 

 tudinally sulciform sculpture and subcarinate upper surface in both sexes; 

 antennae rufopiceous; prothorax fully a fourth wider than long, the converging 

 sides broadly, feebly arcuate, rounding anteriorly to the truncate tubulation, 

 nearly half as wide as the base (9), less (cf); punctures coarse, very dense 

 and confluent, forming irregular longitudinal rugulosity, the median line 

 narrowly smooth and tumid; basal lobe gradual, short and obtuse; scutellum 

 well developed, free, glabrous and somewhat convex; elytra a fifth or sixth 

 longer than wide, rapidly parabolic, rather narrowly rounded at tip, much 

 wider than the prothorax and two-thirds (c?) to four-fifths (9) longer; 

 pale loose yellowish squamules condensed medio-basally; grooves deep, 

 strongly punctured along the bottom; intervals barely at all wider than the 

 grooves and almost wholly occupied by a series of very coarse and confluent 

 punctures, generally sulciform; under surface closely but not so coarsely 

 punctate; male with the first ventral concave, smooth and polished at the 

 middle. Length 4.7-5.0 mm.; width 2.7-2.75 mm. Brazil (Rio de Janeiro). 

 December. Two specimens armata n. sp. 



Body more narrowly rhombiform, piceous, feebly shining, the sculpture and 

 scanty vestiture nearly as in the preceding, except that the pallid squamules 

 are rather more numerous and, at the elytral base, are more concentrated in 

 a spot at each side of the scutellum; squamules of the under surface more 

 distinct, whitish; beak (cf) much more slender, similarly sculptured, very 

 strongly, evenly arcuate and almost three-fifths as long as the body; antennae 

 very obscure rufous; prothorax smaller and with much less arcuate sides 

 anteriorly than in armata, a fifth wider than long, the very abrupt tubula- 

 tion half as wide as the base in the male and relatively much wider than in 

 the same sex of armata; sculpture almost similar, but not quite so coarse, 

 the smooth tumid median line entire, not obliterated on the tubulation as in 

 the preceding; scutellum smaller but similar, except that it is evidently 

 impressed along the middle; elytra much narrower, fully a fourth longer than 

 wide, the oblique sides much less arcuate, the tip narrowly rounded, distinctly 

 wider than the prothorax and almost twice as long, the humeri very slightly 

 more prominent ; sculpture nearly similar, except that the intervals are not 

 at all wider than the grooves, the close coarse punctures of the intervals 

 deeper and better defined; male with a smaller, feebler and narrower im- 

 pression at the middle of the first ventral, the prosternal spines subsimilar 

 and long, but somewhat more slender, rufous and not blackish, and not so 

 deflexed at apex. Length 3.8 mm.; width 1.85 mm. Brazil (Chapada). 

 November. One specimen probata n. sp. 



This is a very distinct and well characterized genus, properly of 

 the Centrinites series, but with peculiar mandibles and greatly 

 developed prosternal processes in the male. 



