414 Memoirs on the Coleoptera 



side, with extremely short feeble lobe; sides converging, moderately and evenly 

 arcuate from base to the extremely feeble short sinuses at the apex, which is 

 much less than half as wide as the base; punctures extremely minute and remote 

 medially, but gradually larger and less sparse laterally and, at the sides, distinct 

 though well separated; elytra large, broadly oval, the sides but feebly oblique, 

 arcuate, gradually broadly rounding behind, only a fifth or sixth longer than wide, 

 nearly a third wider than the prothorax and between two and three times as 

 long, the sutural angle slightly reentrant, the humeri distinctly tumid; grooves 

 coarse and deep, punctured along the bottom; intervals wide suturally, only 

 about as wide as the grooves laterally, nearly smooth, the punctulation not 

 obvious; entire under surface strongly and closely punctate, the abdomen broadly 

 smooth medially, without sexual marks in the type. Length 3.0 mm.; width 

 1.6 mm. Brazil. A single specimen from the Amazon region, sent to me by 

 Desbrochers des Loges. 



It is not practicable to determine the sex of the type, but proba- 

 bilities indicate that it is a male. This species differs from nudi- 

 ventris in its more parallel elytra and more conical prothorax, much 

 shorter, thicker beak and deeper emargination of the thoracic lobe, 

 among other features. 



Hasidus n. gen. 



This is also a remarkably isolated genus in the present section, 

 the body being regularly elongate-oval, closely punctate throughout, 

 sparsely squamulose beneath and opaculate. The beak is moderate, 

 slightly arcuate, gradually thickened and compressed at base, not 

 separated by an obvious depression and with moderate bifid decus- 

 sate mandibles. Antennae moderately long and notably slender, 

 slightly ultra-median, the scape not attaining the eye, the first 

 funicular joint as long as the next two, the second and third also 

 slightly elongate, the others shorter, the three distal joints longer, 

 obconic and slightly longer than wide, the club small, oval, abrupt 

 and not as long as the three preceding joints, with its first segment 

 half the mass. The prosternum is flat, with a simple subapical 

 constriction, separating the coxae by slightly less than their width, 

 the posterior lobe trapezoidal, sinuato-truncate and extending to 

 the mesocoxal tangent. The legs are moderate, the femora mutic, 

 the third tarsal joint rather strongly dilated. The prothorax is 

 briefly and feebly tubulate at apex, the basal lobe extremely short, 

 gradual and obtuse, the scutellum free, truncate, as long as wide, 

 flat and obtriangular, the elytra deeply grooved and the pygidium 

 large, oblique, feebly convex, closely, shallowly punctured, slightly 

 squamulose and as long as wide. The type is as follows: 



Hasidus obliquatus n. sp. — Oval, convex, with feeble humeral swellings, sub- 

 opaque, black, the pronotum with some short erect stiff setae laterally, the elytra 

 with short sparse slender and fuscous subdecumbent squamules, paler and larger 

 at base toward the scutellum, the coarser punctures of the under surface each 

 with a small slender whitish squamule; beak in the type very feebly arcuate, 

 tapering, strongly sculptured and evidently longer than the head and prothorax, 



