220 Memoirs on the Coleoptera 



the oblique sides broadly arcuate, the apex sharply ogival ( 9 ) or obtusely 

 rounded (o 71 ), only a little wider than the prothorax and three-fourths 

 longer, the humeri slightly prominent; grooves sharply marked but not very 

 deep, catenulate and rather more than a fourth as wide as the intervals, 

 which are finely but distinctly, sparsely and unevenly punctate; both sexes 

 with a finely, sparsely punctate and medially impressed basal abdominal 

 segment, the impression smaller, rather narrower and relatively deeper in 

 the male. Length 6.4-7.0 mm.; width 3.7-3.8 mm. Brazil (Chapada — 



campo). October and December. Four specimens sexualis n. sp. 



Form narrower, the size slightly smaller, general characters similar; beak (o 71 ) 

 rather longer and more slender, evenly and moderately arcuate, much longer 

 than the head and prothorax, less distinctly thickened basally, the antennae 

 similarly long, slender and rufo-piceous, the basal segment of the club 

 relatively smaller than in the male of the preceding; prothorax shorter, a 

 third wider than long, the sides converging and nearly straight to about the 

 middle, then gradually rounding to the nearly similar feeble constriction and 

 oblique tubulation; punctures nearly similar but sparser throughout, the 

 apex of the basal lobe somewhat more obtusely rounded; scutellum smaller, 

 smooth, less impressed and slightly wider than long, its sides parallel and 

 arcuate; elytra nearly similar in form and relationships, only a fifth longer 

 than wide and parabolic, nearly four-fifths longer than the prothorax; 

 grooves similar but with more close-set catenulation, the intervals narrower, 

 with much finer and still sparser punctulation, the punctures for the most 

 part in single uneven lines; abdomen with a broader, sparsely, finely punctate 

 basal impression than in the preceding. Length 5.8 mm.; width 3.2 mm. 

 Brazil (Chapada — campo). December. One male specimen remota n. sp. 



Remota can be distinguished easily from sexualis by the narrower 

 outline, different form of the thoracic sides and of the scutellum, 

 longer beak and sparser and finer interstitial punctures, besides a 

 broader form of the abdominal impression in the male. The hind 

 tibiae are a little longer, narrower and smoother in the male than 

 in the female, just the reverse of the differences seen in Macrorevena, 

 and the very much longer and more slender antennas are radically 

 different, as well as the prosternal characters. 



Selasella n. gen. 



In this genus the size is very moderate, the body broad anteriad, 

 tapering posteriad and somewhat strongly convex and polished. 

 The beak is evenly and distinctly arcuate and almost similar in 

 the sexes, being merely a little less slender in the male, the antennal 

 scrobes moderately oblique, the scape rather short, not quite 

 attaining the eye and the funicle slender, with its basal joint notably 

 long, being equal to the next three, the second also elongate and 

 almost as long as the succeeding two, the club rather large, oval, 

 somewhat abrupt, longer than the preceding four joints, with its 

 first segment much less than half the mass. The broad flat pro- 

 sternum separates the coxae by fully one-half more than their width, 

 having, anteriorly, just behind the transverse constriction, a feeble 

 impression ; between the small triangular erect pointed plates of 



