9 2 Memoirs on the Coleoptera 



Form stout, subrhombic-oval, in color, lustre and sculpture nearly as in chapa- 

 danns; beak (o 71 ) rather longer than the head and prothorax, feebly arcuate, 

 distinctly dilated at apex, longer and very much thinner than in lyratus 

 and less compressed, loosely punctate, the medial carina obtuse, the lateral 

 long and distinct, or ( 9 ) nearly half as long as the body, somewhat more 

 arcuate and perhaps a little thicker, less dilated at apex; eyes separated by 

 a fifth the rostral width ( 9 ), or a sixth (c? 1 ); head closely and deeply punc- 

 tate, the punctures small and oval; prothorax nearly as in chapadanus, 

 much shorter than in lyratus, four-fifths wider than long, the form, sculpture 

 and the basal lobe nearly as in the former, the scutellum less transverse and 

 rather deeply impressed; elytra obtusely oval, similar in form and sculpture, 

 as long as wide ( 9 ), a little shorter and more broadly obtuse (o 71 ), distinctly 

 more than twice as long as the prothorax in both sexes; abdomen rather 

 finely but strongly, loosely punctate, not evidently modified in the male. 

 Length 2.6-2.85 mm.; width 1.75-2.0 mm. Brazil (Santarem). Seven 

 specimens fluminalis n. sp. 



The first and last of these species differ from each other very- 

 much in the sculpture of the head, and lyratus differs from both in 

 the very much stouter beak and less abbreviated prothorax. 



Acoleomerus n. gen. 



This genus differs radically from Coleomerus and Harotreus in 

 the long and more slender hind femora, comparatively minute 

 antennal club and widely separated eyes; the beak is moderately 

 arcuate, thick basally, becoming gradually flattened to the thin 

 and somewhat dilated apex. The male has the beak a little less 

 thickened basally, but not appreciably shorter than in the female, 

 the abdomen strongly, rather closely punctate at base, with a 

 large and shallow but unmodified impression; in the female, the 

 basal parts are more finely and sparsely punctate and not definitely 

 impressed. The type is the following: 



Acoleomerus rufofasciatus n. sp. — Body evenly and broadly oval, convex and 

 shining, glabrous throughout in both sexes, deep black, the abdomen obscure 

 rufous only in the female; elytra in both sexes black, with a broad rufous basal 

 fascia, a fourth suturally, to one-half laterally, the total length; beak short, only 

 three-fourths as long as the prothorax in both sexes, compressed and closely 

 punctate at the sides basally, with a smooth obtuse dorsal ridge, which is flanked 

 on each side by a fine raised thread; eyes moderate, separated by about the 

 rostral width, the interval flat and punctureless, the head rather closely and 

 strongly punctate; antennal club not quite as long as the three preceding 

 joints, the basal segment nearly three-fourths the mass; prothorax three-fifths 

 wider than long, the sides converging and evenly, strongly arcuate to the feebly 

 constricted truncate apex, less than two-fifths as wide as the base, the basal lobe 

 very broad and gradual, with narrowly rounded apex; surface more convex 

 than usual, with very sparse punctures, strong laterally, obsolescent and minute 

 medially; scutellum black, transversely oval, truncate at base and flat; elytra 

 obtusely oval, barely longer than wide, a fifth wider than the prothorax and less 

 than twice as long, the broadly rounded humeri clouded above with blackish 

 tint; grooves -sharp, deep and smooth posteriorly, coarser and more impressed 

 in the rufous fascia, where the broad flat intervals become feebly convex, having 



