218 Memoirs on the Coleoptera 



intervals; male with two narrow obtuse and punctate, straight diverging 

 prosternal ridges, becoming prominently angulate near the coxae and sepa- 

 rated by a deep smooth cavity, the abdomen medio-basally broadly, subangu- 

 larly concave and finely, densely pubescent, the subacute bottom smooth, 

 the hind tibiae broadly inflated, convex and rather strongly, unevenly punc- 

 tate. Length 5.6 mm.; width 3.25 mm. Brazil (Santarem). One speci- 

 men latitibia n. sp. 



Body much stouter, rhombic-oval, the sides of the prothorax strongly arcuate, 

 becoming subparallel in nearly basal half 2 



2 — Prothorax relatively narrower, only three-fourths as wide as the elytra, 

 polished, black; beak (9) slightly longer than the head and prothorax, 

 subevenly and distinctly arcuate, rather thick and strongly sculptured 

 laterally behind, more slender, cylindric and nearly smooth beyond, the 

 antennae, which are rufo-piceous in color; prothorax three-sevenths wider 

 than long, the surface, tubulation and basal lobe nearly as in the preceding; 

 scutellum shorter and medially more impressed, otherwise nearly similar; 

 elytra a fifth longer than wide, broadly parabolic, but with narrowly rounded 

 apex, distinctly more than twice as long as the prothorax; grooves coarse and 

 deep, somewhat punctulate and rather more than a fourth as wide as the 

 smooth and broadly convex intervals, the large humeri obliquely rounding 

 to the base, the mes-epimera scarcely at all visible from above; abdomen in 

 the female deeply, subangularly impressed medio-basally but not differently 

 punctate from the rest of the surface, except that at three-fourths from the 

 base there is a transversely oval area of fine, dense punctures, bearing long 

 brown hairs, and also a somewhat similar transverse area at the anterior 

 edge of the second segment; hind tibiae normal but coarsely, very densely 

 punctate. Length 7.2 mm.; width 4.5 mm. Brazil (Tijuca — near Rio de 

 Janeiro). November. One specimen convexa n. sp. 



Prothorax larger, four-fifths as wide as the elytra, the integuments as in the 

 preceding; beak (a 71 ) as long as the head and prothorax, evenly arcuate, 

 rather thick, with the compressed sides coarsely, rugosely punctate basally, 

 gradually tapering and nearly smooth distally, or ( 9 ) almost similar but a 

 trifle longer and less thick, gradually cylindric distally and with the sides 

 basally less compressed and less coarsely, loosely punctate; antennae rufo- 

 piceous; prothorax nearly as in convexa in form and sculpture in both sexes, 

 the scutellum also similar but not impressed; elytra nearly a third (o 71 ) to 

 less than a fourth ( 9 ) longer than wide, much more than twice as long as 

 the prothorax, the general form and sculpture nearly as in convexa but not 

 so stout, with the grooves smoother and barely more than a fourth as wide 

 as the smooth intervals, which are not convex but flat; humeri and 

 mes-epimera nearly similar; male with two anteriorly directed short pro- 

 sternal spines, one-half longer than the thickness of the anterior femora in 

 the type, and separated by a very deep circular cavity, the abdomen medio- 

 basally angularly impressed and finely, densely punctate, with smooth 

 bottom line and also with some long brown hairs on the second segment at 

 the middle of the base, not present in latitibia, where, however, the corre- 

 sponding area is finely punctured; hind tibiae inflated and convex, more 

 strongly punctured than in latitibia; female with the abdomen broadly, 

 feebly impressed, sharply so medially at base and coarsely, sparsely punctate 

 and clothed with very long subdecumbent hairs distally on first segment, 

 these extending to the second segment. Length 6.0-6.2 mm.; width 3. 7-3.8 

 mm. Brazil (Tijuca). November. A single pair atromicans n. sp 



Medio-basal abdominal characters relating to punctuation, im- 

 pression and vestiture peculiar to each sex, are also observable in 



