212 Memoirs on the Coleoptera 



two preceding, the flattened sides are simply coarsely and discretely 

 punctate. The mandibles are unusually long and are prominent 

 when closed, the antennae notably short, thick and rather compact, 

 the obconic first funicular joint fully as long as the next three, which 

 are short and equal, the club short, obtusely oval, rather gradually 

 formed and only as long as the preceding three joints. The pro- 

 sternum is convex along the middle, except anteriorly, and rather 

 widely separates the coxae; there is no trace of ante-coxal spines 

 in the male. The femora are stout and mutic, the tibiae very short 

 and the claws well developed, free and strongly diverging. The 

 prothorax is subquadrate, abruptly tubulate, the scutellum elongate, 

 the elytra deeply grooved and the integuments shining and glabrous 

 throughout. There are three species at hand as follows: 



Form oblong, subrhombic-oval, shining, black; beak differing very little in the 

 sexes, not quite as long as the head and prothorax, just visibly longer and 

 less thick in the female, the flattened sides basally somewhat concave and 

 strongly, loosely punctate, the remainder finely, sparsely so, more densely 

 toward tip in the male; antennae virtually black, the scrobes very oblique; 

 prothorax two-fifths wider than long, the sides subparallel and barely visibly 

 arcuate, almost angularly rounded and then subtransverse at apex to the 

 tubulation, which is about half as wide as the base; the basal lobe moderate, 

 rather rapidly formed and with sinuate apex; punctures somewhat small, 

 remote, evidently coarser but still sparse laterally; scutellum narrow, one- 

 half longer than wide and obtrapezoidal; elytra obtusely parabolic, a fourth 

 longer than wide to less, more than a fourth wider than the prothorax and 

 distinctly more than twice as long, the humeri rather prominent; grooves 

 deep, feebly punctulate, about a third as wide as the intervals, each of which 

 has a single series of moderate and well separated punctures; male with the 

 abdomen rather closely punctate basally, more finely in the somewhat shal- 

 low medio-basal impression, the female abdomen finely, very sparsely punc- 

 tate. Length 4.0-4.6 mm.; width 2.2-2.4 mm. Brazil (Chapada— forest). 

 November. Eleven specimens oblongus n. sp. 



Form shorter and relatively broader, with longer prothorax, deeper and more 

 polished black throughout; beak (c?) still shorter, not quite as long as the 

 prothorax, the punctures in the subbasal concavity at the sides not so coarse 

 and sparser; antennae nearly similar but less medial, at about three-fifths; 

 prothorax nearly similar in general outline and structure, but larger and 

 only a fourth wider than long, with the sparse punctures coarser and more 

 impressed, and, although noticeably somewhat larger, only very little less 

 sparse laterally; scutellum much less elongate and nearly quadrate, also 

 with less evident fine punctulation; elytra nearly similar but shorter, ob- 

 tusely oval, not a fifth longer than wide and scarcely twice as long as the 

 prothorax, the grooves not quite so coarse, the surface nearly similar; male 

 with the abdomen subsimilarly punctate basally, but with the impression 

 rather more acute along the bottom. Length 4.2 mm.; width 2.35 mm. 

 Brazil (Santarem). A single male thoracicus n. sp. 



Form narrower and more elongate than in either of the preceding, piceous-brown 

 in color, the beak and antennae black, similarly shining; beak ( 9) scarcely 

 as long as the head and prothorax, much less inflated basally than in the 

 female of oblongus, the curvature of the upper surface from base to apex 

 very nearly even and without the tumidity at basal third, the sides flattened 



