256 Memoirs on the Coleoptera 



Elytra each with a large, transversely subquadrate basal area of dense pale scales, 

 extending from the scutellum to the fifth or sixth stria; antennal club long 

 and cylindric in both sexes; prosternum with a deep circular perforation in 



the male; body as in the armatus section 13 



2 — Third strial interval rather rapidly dilated basally, the densely squamose 

 spot oblong, not extending quite through basal third, that on the fifth still 

 shorter, in basal fourth or fifth. Body strongly rhombic, polished, black 

 and smooth above, the under surface with minute and sparse punctures, the 

 prosternum with dense yellowish-white scales, divided by the glabrous canal 

 in the male, the lateral part of the metasternum, the met-episterna and sides 

 of the last four abdominal segments, also so clothed; beak (o 71 ) distinctly 

 longer than the elytra, with rather strong sparse punctures, gradually thinner 

 apically; antennae black, the club fully as long as the entire funicle; pro- 

 thorax a third wider than long, the arcuate sides sometimes nearly parallel 

 basally, the strong apical tubulation with some small sparse punctures; 

 basal lobe gradual, rounded; scutellum small, almost rounded; elytra 

 triangular, with narrowly rounded apex and very feebly arcuate sides, less 

 than twice as long as the prothorax, the grooves narrow and impunctate; 

 male with an impressed and sparsely pubescent area at the apex of the first 

 ventral and two prosternal spines, very short and only as long as the femoral 

 thickness to twice as long, the intermediate glabrous impression very deep 

 posteriorly, much less developed in the specimens with shorter spines. 

 Length 3.7-4.0 mm.; width 2.15-2.3 mm. Brazil (Chapada— campo). 



November. Two male examples rhombus n. sp. 



Third strial interval very gradually wider basally, its densely squamose line 

 always extending well behind the middle and very gradually, evenly atten- 

 uated from base to tip, the line on the fifth interval much narrower, parallel 



and very much shorter 3 



3 — Outer squamose line of the elytra two-fifths to half as long as the inner 4 



Outer line extremely short and basal 8 



4 — Body smaller and notably narrow, the prothorax shorter, a third wider than 

 long. Form sharply rhombic; sculpture as in the preceding, the densely 

 squamose areas beneath also similar, except that the outer part of the meso- 

 sternum is also densely covered; punctures of the mes-epimera strong and 

 close; beak (9) distinctly shorter than the elytra, feebly arcuate, rather 

 thick and strongly punctured behind, rapidly slender, very smooth and 

 cylindric beyond, the antennae, which are inserted evidently behind the 

 middle, black, the club slightly shorter than the funicle; sides of the pro- 

 thorax feebly converging and slightly arcuate, a little more so near the very 

 broad tubulation, which is two-thirds as wide as the base; basal margin 

 with some fine punctulation, the very short and gradual lobe broadly arcuate, 

 with a broad feeble median sinus, the scutellum oval, wider than long; 

 elytra triangular, a third longer than wide, only little less than twice as 

 long as the prothorax, striate as in the preceding, the inner dense cuneiform 

 line of scales extending only through four-sevenths, the outer line three- 

 sevenths as long as the inner. Length 3.8-5.0 mm.; width 2.0-2.5 mm - 

 Brazil (Chapada). October and November. Three females. 



cuneipennis n. sp. 

 Body larger, notably more broadly but sharply rhombiform, the prothorax less 



abbreviated, never more than a fourth wider than long 5 



5 — Antennal club (d" ) about as long as the funicle, or ( 9 ) evidently shorter.. .6 



Antennal club (o 71 ) somewhat shorter than the funicle 7 



6 — Prothorax as long as wide and more or less piceous in color; body polished, 

 black, the upper surface with sparse and infinitesimal punctulation, the 

 inner squamose line extending to apical third, the outer fully half as long as 



