420 Memoirs on the Coleoptera 



Body smaller than in any of the preceding three, more greenish-blue in color, the 

 legs with still more greenish reflection; outline narrower; beak greenish, as 

 arcuate as in humeralis and more so than in violaceus, shorter than in either 

 and barely as long as the prothorax, finely, sparsely punctate, the sides 

 concave along the middle, the antennae less apical, at four-sevenths, nearly 

 similar but less thick distally than in humeralis; prothorax even more 

 strongly convex in profile, two-thirds wider than long, the strongly arcuate 

 sides nearly straight and feebly divergent posteriorly in almost basal half; 

 tubulation scarcely more than a third as wide as the base; punctulation 

 barely traceable; basal lobe evenly rounded; scutellum only a fourth wider 

 than long, smooth, its converging sides straighter and its very acute apex 

 more prolonged; elytra very slightly longer than wide, of the same general 

 outline, the striae very fine but deep and distinct, with more distinct and 

 somewhat impressed punctures; pygidium nearly as in the preceding; 

 abdomen (d") with a moderate but rather deeply concave medial impression 

 at base, the fovea of the fifth segment transversely oval, densely brunneo- 

 pubescent, the pubescence subdivided along the middle. Length 7.5 mm.; 

 width 5.25 mm. Brazil (Chapada). December. One specimen. 



cobaltinus n. sp. 



7 — Posterior lobe of the prosternum deeply concave, the surface before the 

 cox83 sharply but shallowly canalate, the coxae separated by two-fifths their 

 width. Body rather broadly oval, convex and polished, uniformly very 

 bright green, the beak and legs suffused to some extent with coppery lustre; 

 beak (6") feebly arcuate, as long as the head and prothorax, the sides only 

 feebly impressed medially in basal half, the punctures fine and sparse; 

 antennae at four-sevenths, the funicle rather slender basally but gradually 

 thick distally, and as wide as the club, the joints deeply foveate on one side; 

 prothorax campanulate, barely one-half wider than long, the sides converging 

 and evenly, moderately arcuate from base to the shorter and less abrupt 

 tubulation, which is two-fifths as wide as the base; punctures scarcely 

 observable and very remote; basal lobe with a small discal impression at 

 apex; scutellum a third wider than long, its sides converging and arcuate to 

 the prominent acute apex; elytra fully as wide as long, the part behind the 

 very prominent and obtusely rounded humeri more parabolic than in the 

 preceding section, one-half longer than the prothorax; striae discally ex- 

 tremely fine and almost obsolete, very minutely, feebly punctulate; pygidium 

 rounded, one-half wider than long and sparsely punctate, more finely than 

 in the preceding section; first ventral (c?) rather strongly punctate, with a 

 deep smooth median impression, the fifth with a deep nude fovea, which is 

 somewhat wider than long. Length 6.8 mm.; width 4.3 mm. Mexico 

 (Tabasco). One specimen cavilobus n. sp. 



Posterior lobe not concave, the anterior prosternal surface canalate, the coxae 

 always separated by much less than their width 8 



8 — Body very stout, oblong-oval and convex. Polished, with uniform bright 

 green lustre throughout; parts of the beak and legs with the faintest possible 

 suffusion of cupreous; beak feebly arcuate, a little longer than the head and 

 prothorax, somewhat shorter in the female, finely, sparsely punctate, feebly 

 impressed along the sides; antennae barely beyond the middle ( 9 ), at four- 

 sevenths (o 71 ), the funicle rather slender basally, gradually moderately thick 

 distally, the articular foveae very small and inconspicuous, the club sharply 

 conical; prothorax three-fifths wider than long, the sides strongly arcuate, 

 becoming parallel behind the middle, the tubulation very abrupt, a third as 

 wide as the base (o 71 ), nearly three-sevenths ( 9 ); basal lobe broadly, evenly 

 arcuate; punctures minute, remote and barely visible; scutellum one-half 

 wider than long, the apex acute and prominent; elytra as long as wide, the 



