122 Memoirs on the Coleoptera 



base but not quite attaining the basal edge; inferior thoracic flanks with a 

 very few moderate punctures, the hind body rather strongly, more closely 

 punctate; abdomen medio-basally scarcely more than flat, moderately and 

 remotely punctate; tibiae externally only rounded, not prominent; male 

 without prosternal spines. Length 5.7-6.2 mm.; width 4.2-4.4 mm. Brazil 

 (Santarem). Two specimens, apparently male hebes n. sp. 



Body distinctly smaller, not quite so stout; beak not (c?) or distinctly (9) 

 shorter than the prothorax, a little shorter in the female than in the male; 

 moderately arcuate, strongly sculptured; antennae medial, similar in the 

 sexes, blackish, the first funicular joint about twice as long as wide, subequal 

 to the next two, the second thinner, obconic, not one-half longer than wide, 

 the club widest beyond the middle, about as long as the four preceding joints; 

 prothorax three-fifths wider than long, the sides becoming very oblique 

 toward the tubulation, which is a third as wide as the base (cf ), much wider 

 and almost half as wide as the base ( 9 ); basal lobe very obtusely rounded, 

 the apex feebly and closely punctate at the edge; scutellum much less 

 transverse than in hebes, only a little wider than long, narrowed slightly 

 from apex to base, flat, truncate at apex; elytra triangular, scarcely as long 

 as wide (9), or slightly longer (o 71 ), much wider than the prothorax and 

 four-fifths (d" ) or three-fifths ( 9 ) longer, the oblique sides feebly arcuate, a 

 little more so between the feeble undulations, the apex very narrowly rounded ; 

 grooves deep, coarse and feebly punctulate, the inner not much dilated 

 basally, the second crossing the basal edge; presternum (o 71 ) having two 

 rather short and erect, slender spines, the abdomen medio-basally feebly 

 impressed and loosely punctate, or ( 9 ) without spines and with the basal 

 abdominal segment convex, strongly, very densely punctured throughout 

 and with a deep impressed line along the middle. Length 5.4-5.65 mm.; 

 width 3.65-3.8 mm. Brazil (Chapada). March and November. Three 

 specimens convexus n. sp. 



Body nearly as in convexus but rather larger; beak (o 71 ) a little shorter, not quite 

 as long as the prothorax, similar in form and sculpture; antennae blackish, 

 scarcely so long as in the preceding, the first funicular joint three-fifths 

 longer than wide, not quite as long as the next two, the second as in convexus, 

 the club shorter, more evenly oval and only as long as the preceding three 

 joints; prothorax similar in general form, though a trifle more transverse, 

 the sides beyond the middle still more rapidly and broadly subtransverse to 

 the tubulation, which is somewhat longer, a fifth the total length; basal 

 lobe obtusely rounded, the declivo-convex apex strongly punctate, the 

 lateral impressions even more distinct; scutellum similar in form and size 

 but feebly concave posteriad; elytra nearly similar, very slightly longer, 

 with more pronounced subapical tumidity and deeper biundulation of the 

 flanks; under surface with almost similar sculpture and sexual characters, 

 the legs somewhat longer, with rather more clavate femora. Length 5.8 

 mm.; width 4.0 mm. Brazil (Chapada — campo). December. One male. 



atromicans n. sp. 



Body subsimilar to that of convexus in general form and structure, but smaller; 

 beak (o 71 ) as long as the head and prothorax, not quite so stout as in convexus 

 and rather less closely, though strongly, sculptured; antennae much shorter, 

 black, the first funicular joint one-half longer than wide, not quite as long as 

 the next two; club short, broadly oval, as long as the four preceding joints, 

 the entire funicle barely longer than the scape ( 9), distinctly longer (o 71 ); 

 prothorax as in convexus in both sexes, except that the basal lobe is more 

 punctured and is feebly squamulose; head and tubulation similarly much 

 broader in the female than in the male; scutellum as in convexus; elytra 

 throughout as in that species, the grooves rather less coarse; male with 



