Brazilian Baring 63 



Group I 



Subgenus Hiotus in sp. 



Color in the various subdivisions of Hiotus is a very important 

 character, all the numerous species of the second group being as 

 intensely and uniformly black throughout, as the less numerous 

 representatives of Hiotus proper are sharply and conspicuously 

 bicolored. The eight species may be defined as follows: 



Hind tibiae feebly oblique and straight at base, the external angle obtuse to rather 

 well marked, but not in the least prominent; scutellum quadrate and con- 

 cave 2 



Hind tibiae strongly and more broadly oblique externally at base, the angle with 

 its apex forming a small, sharp and slightly prominent tooth; scutellum 

 narrowed behind and flat 7 



2 — First ventral segment subevenly tumid medially, having only a very fine and 

 feebly impressed longitudinal line; basal thoracic lobe truncate 3 



First ventral with the usual transverse tumidity rather broadly concave medi- 

 ally 4 



3 — Body very broadly, subevenly ovoidal, polished, deep black, the elytra some- 

 what picescent basally, the pronotum bright rufous; beak thick, feebly 

 arcuate, three-fifths as long as the prothorax, a little shorter in the male, 

 strongly, rather closely punctate, finely, more sparsely above, the upper 

 surface a little more sloping distally; antennae submedial, the club slightly 

 more than half as long as the funicle; head closely punctate, finely, sparsely 

 between the eyes, the fovea small but evident; prothorax large, nearly a 

 third wider than long, the sides strongly, evenly arcuate from base to tubu- 

 lation, which is less than a third as wide as the base; surface very smooth; 

 basal lobe broad, not punctate or laterally impressed; scutellum quadrate, 

 deeply concave, smooth, a little shorter than wide, especially in the female; 

 elytra fully as long as wide, broadly parabolic, only very little wider than the 

 prothorax, the humeri broadly rounded and not prominent; striae moder- 

 ately coarse, deep and grooved internally, gradually fine, unimpressed and 

 finely punctate on the flanks, the two lateral deep, grooved; intervals wide, 

 nearly smooth; propleura very smooth, the sides of the prothorax broadly 

 rounded in section; sterna and side-pieces strongly, evenly and sparsely 

 punctate; basal abdominal segment extremely densely punctate, the tumid- 

 ity broadly flattened medially with a narrow and feeble impressed line; 

 outer hind tibial angulation at base bluntly rounded at apex. Length 4.2- 

 44 mm.; width 3.2 mm. Brazil (Chapada). November. Two specimens, 

 apparently male and female inflatus n. sp. 



Body very nearly as in the preceding in color, form and lustre, but not quite so 

 broadly rounded and with the sides of the prothorax more evenly arcuate 

 from base to the similar narrow tubulation; beak (o 71 ; almost similar, but 

 not quite so thick, the antennal club a trifle more slender, nearly three-fifths 

 as long as the funicle; elytra slightly less elongate, with the tip more broadly 

 rounded, not quite as long as wide, the sides much more arcuate than in 

 inflatus, but otherwise nearly similar; mes-epimera with the similarly well 

 separated punctures slightly coarser; hind tibia? somewhat broader, with 

 the angle limiting the basal obliquely more sharply defined; very densely 

 punctate and tumid first ventral more convex medially, with feebly im- 

 pressed median line. Length 4.0 mm.; width 3.2 mm. Brazil (Chapada). 

 November. A single male obesus n. sp. 



