134 Memoirs on the Coleoptera 



Gladosius n. gen. 



The moderate number of known species in this genus resemble 

 Diastethus somewhat in general form and in their bright metallic 

 coloration, but differ in the simple mesosternum, absence of sharply 

 defined areas of dense squamosity beneath and, most particularly, 

 in the very elongate and solid antennal club, which induced Schon- 

 herr to place the few forms known to him in the widely dissimilar 

 Cylindrocerus. The beak is more or less long, but of various forms, 

 the prosternum deeply and abruptly channeled, and the femora 

 are spiculate beneath, as in all the allied genera of this section; 

 the prothorax is abruptly tubulate at apex. I have at hand, at 

 the present time, four well characterized species as follows: 



Prothorax, as viewed in profile, strongly and evenly convex behind the tubulation. 

 Rather narrowly rhombic-oval, polished, deep indigo-blue in color, the 

 under surface and legs more greenish blue; beak (c?) very slender, moder- 

 ately arcuate, slightly thickened basally and broadly subangulate dorsally 

 near the antennal insertion at basal fourth or fifth, fully as long as the elytra, 

 finely, sparsely punctate, flattened and more strongly punctate at the sides, 

 especially toward base; antennae piceous, the funicle thick and very compact, 

 the first joint one-half longer than wide, about as long as the next three, the 

 other six joints very short, transverse and compact, the club solid, cylindric, 

 extremely elongate, between three and four times as long as the entire 

 funicle; prothorax two-fifths wider than long, the sides broadly rounding 

 and subparallel, more rounding anteriorly, the abrupt tubulation three- 

 sevenths as wide as the base; surface very smooth as usual, the basal lobe 

 broadly obtuse, punctulate, strongly, lunately punctate along the edge 

 between the subobsolete lateral impressions; scutellum large, subquadrate, 

 smooth, feebly impressed and wider than long; elytra triangular, somewhat 

 elongate, three-fourths longer than the prothorax and much wider, the 

 oblique sides feebly arcuate; apex somewhat obtuse, the humeri prominent; 

 striae rather fine but deep, distinctly punctate, not grooved, slightly dilated 

 at base; under surface coarsely, loosely punctate, the femora rather sparsely; 

 abdomen with the first segment transversely impressed and sparsely punctu- 

 late, with a transverse and subquadrate, more convex and smooth median 

 part at apex. Length 5.1 mm.; width 3.35 mm. Brazil (Chapada — cam- 

 po). November. One example mirabilis n. sp. 



Prothorax as in the preceding. Body larger, rhombiform, deep polished blue, 

 more greenish beneath, especially on the legs; beak (d") thicker, a little 

 more so basally, rather compressed, strongly but sparsely punctate, distinctly 

 arcuate and three-fourths as long as the elytra; antennae shorter, with much 

 longer funicle and shorter club, the first funicular joint three times as long 

 as wide and almost as long as the next three joints, the second two-thirds 

 longer than wide, the club asymmetric, not quite as long as the funicle and 

 widest near basal third: prothorax rather more than one-half wider than 

 long, the strongly rounded sides gradually subparallel in nearly basal half, 

 the constriction with some rather strong punctures; apex three-sevenths as 

 wide as the base, the basal lobe nearly smooth, obtuse, with evident lateral 

 impressions, the apex acutely emarginate; scutellum large, transverse, 

 smooth and narrowed from apex to base; elytra triangular, a fifth longer 

 than wide, much wider than the prothorax and three-fourths longer, the 

 oblique sides broadly arcuate, the apex somewhat strongly rounded; humeri 



