64 Memoirs on the Coleoptera 



Body nearly similar in general form, polished lustre and in coloration, but much 

 smaller in size, slightly narrower and with more rufescent elytra basally; 

 beak similarly short in the male, but much less stout, similarly sculptured, 

 the antennal club a little longer, about two-thirds as long as the funicle; 

 prothorax nearly as in obesus, the converging sides more evenly arcuate than 

 in inflatus: scutellum similarly smooth and concave, subquadrate, a little 

 wider than long; elytra throughout nearly as in inflatus, but narrower, 

 slightly elongate, similarly more narrowly rounded at apex than in obesus; 

 humeri smaller and somewhat more narrowly and subprominently rounded 

 than in either of the preceding; mes-epimera narrower than in inflatus, 

 but similarly punctate, densely, rugosely sculptured; basal segment of the 

 abdomen more tumid medially, the median impressed line dividing it into 

 two pronounced tumuli; angulation at base of the hind tibiae rather blunt at 

 tip. Length 3.2 mm.; width 2.25 mm. Brazil (Chapada). March. 



tumidibasis n. sp. 



4 — Thoracic lobe truncate 5 



Thoracic lobe feebly sinuate at tip 6 



5 — Form and general characters nearly as in the preceding, but with more uni- 

 formly piceous elytra and more elongate prothorax; beak thick, feebly 

 arcuate, strongly sculptured and two-thirds as long as the prothorax, the 

 narrow and elongate-oval antennal club almost as long as the preceding six 

 joints of the funicle; prothorax only a fifth or sixth wider than long, other- 

 wise throughout nearly as in the two preceding; scutellum quadrate, smooth 

 and concave; elytra throughout as in inflatus, but with the humeri less 

 broadly rounded and somewhat more prominent; hind tibiae with the external 

 basal prominence broadly rounded at the summit. Length 3.6 mm.; width 

 2.5 mm. Brazil (Chapada). . .March. One female specimen. 



caviscutis n. sp. 

 Form a little narrower, the elytra paler, piceo-rufous in color throughout, the 

 prothorax shorter, nearly a third wider than long; beak similar, but two- 

 thirds as long as the prothorax, similarly arcuate, thick and coarsely sculp- 

 tured; antennae a little shorter, the club not quite so slender, though about 

 as long as the preceding six joints; prothorax with the sides converging and 

 evenly arcuate from base to tubulation, the latter a little broader than in the 

 preceding species and more than a third as wide as the base; minute punctu- 

 lation unusually distinct and impressed; scutellum smooth, quadrate and 

 concave, similar in general form, but rather notably wider than long; elytra 

 as in the preceding, though even more evidently longer than wide and with 

 similarly narrowly rounded tip, but with the sides less arcuate, the humeri 

 not quite so narrowly rounded; outer angle of the hind tibiae much better 

 defined, scarcely even blunt at tip. Length 3.0 mm.; width 2.18 mm. 



Brazil (Chapada). March. One female. . hilaris n. sp. 



6 — Body more broadly ovoidal, similar in color and polished lustre, the elytra 

 dark piceo-rufous; beak thick, feebly arcuate, nearly three-fourths as long 

 as the prothorax and strongly, closely sculptured, almost equally so above 

 and at the sides; antennal club shorter, as long as the four or five preceding 

 joints, its four segments equal in length as usual; prothorax a fifth wider than 

 long, the sides strongly, subevenly arcuate from base to tubulation, the latter 

 barely a third as wide as the base; sparse punctulation very minute as usual; 

 scutellum concave, wider than long; elytra as usual but little wider than the 

 prothorax, not longer than wide, parabolic, with notably arcuate sides and 

 narrowly rounded apex, the humeri broadly rounded; striation as in all the 

 preceding; external angulation of the hind tibiae unusually large and ele- 

 vated, but with its summit bluntly rounded; sculpture of the mes-epimera 

 differing from that of the preceding species, the coarse separated punctures 



