Brazilian Baring 483 



quite different. The body is subrhombic, polished and sparsely 

 but strongly sculptured, the upper surface with a few erect stiff 

 setae, arranged as in the preceding genus, the fine setiform decum- 

 bent squamules of the under surface similar and sparse. The beak 

 is very thick, slightly arcuate, separated by a deep reentrant angle 

 and distinctly but sparsely punctate, cylindric, only slightly tapering 

 and not in the least compressed. Antennae well beyond the middle, 

 the first funicular joint nearly as long as the next three, the others 

 short, setulose, the club abrupt, oval, notably small in size and not 

 longer than the three preceding joints, its basal segment sparsely 

 pubescent and half the mass. Prosternum deeply and sharply 

 canalate, narrowly separating the coxae, the posterior lobe small, 

 trapezoidal, sinuato-truncate at apex. Prothorax, scutellum, elytra, 

 legs, tarsi and ungues nearly as in the preceding, except that the 

 elytral surface is strongly undulate. Pygidium small, semicircular, 

 evenly and feebly convex. The type may be described as follows: 



Euzathanius undulatus n. sp. — Form elongate-subrhombic, black throughout, 

 smooth and polished; beak very thick, polished, sparsely punctate and distinctly 

 shorter than the prothorax, the arcuate upper profile descending rapidly at base 

 to the bottom of the impression; antennae black; prothorax a fourth or fifth 

 wider than long, the sides feebly converging and straight, rounding anteriorly to 

 the constriction, the tubulation not so abrupt as in the preceding genus and more 

 than half as wide as the base, the basal lobe a little more prominent medially; 

 punctures coarse and smaller sparsely intermingled, separated by two or three 

 times their width laterally and very irregularly arranged discally, having a broad 

 smooth medial line and a large oblong area at lateral fourth in basal half, also a 

 median vacant area connected with the smooth median line; scutellum free, 

 transverse; elytra one-half longer than wide, the distinctly oblique sides broadly, 

 evenly arcuate, the apex rather narrowly obtuse, at the large and rather prominent 

 humeri a third wider than the prothorax, two and one-half times as long; grooves 

 coarse, deep, finely punctate along the bottom, fully half as wide as the intervals, 

 which have small and remote punctures in single series; pygidium notably small, 

 very deeply and densely punctate; first ventral suture wholly obsolete medially. 

 Length 4.5-4.8 mm.; width 2.1-2.25 mm- Brazil (Chapada). March and 

 November. Three specimens, apparently female. 



It is singular that two species, having so many characters in 

 common, should have to be assigned to two separate generic groups, 

 and yet the structural differences in the beak and antennae would 

 seem to demand this separation. 



Thanius n. gen. 



The body here is smaller in size, more oblong-oval, glabrous and 

 without erect setae, smooth, polished and much less strongly sculp- 

 tured. Beak rather long and slender, sometimes rapidly more 

 arcuate dorsally at base but not tumid, the separating reentrant 

 angle moderate. Antennae distinctly behind the middle, the first 



