52 Memoirs on the Coleoptera 



bottom, the ninth and tenth rather close and very coarse, more separated in 

 basal third; abdominal plaque broadly and evenly concave, strongly and 

 closely punctate; hind tibiae densely gilvo-ciliate within distally in the male, 

 the external tooth very broad, low and rather obtuse. Length 9.4 mm.; 

 width 6.6 mm. Brazil (Chapada). November. A single male. 



caviventris n. sp. 



Body somewhat as in the preceding but much smaller and narrower, and with the 

 black polished elytra rufescent toward the humeri, the pronotum rufous; 

 beak nearly similar throughout but somewhat shorter, the antennal club 

 longer, relatively more slender and almost as long as the funicle; prothorax 

 smaller, barely a fifth wider than long, the sides more arcuate and more con- 

 verging from the base, but becoming similarly more rounded anteriorly; 

 basal lobe similar; scutellum smaller, wider than long and similarly punctate, 

 but more convex, the deeply sinuate apex defined by the oblique and pointed 

 divaricate apical angles in a manner quite different from that of caviventris; 

 elytra similar but narrower and with the subapical prominences less con- 

 spicuous, the coarse ninth and tenth stria; posteriad still more approximate; 

 evenly concave basal abdominal plaque with equally coarse but more sepa- 

 rated punctures; hind tibiae similarly ciliate within but only near the apex, the 

 external tooth a little higher and sharper. Length 7.8 mm.; width 5.5 mm. 

 Brazil (Chapada). One male example sinuatiscutis n. sp. 



Body slightly more abbreviated than in the two preceding, shining, deep black, the 

 elytra toward the sides and the pronotum very obscure rufous; beak similar 

 in size, thickness and feeble taper, but rather more cylindric in the male, 

 the less flattened sides coarsely, confluently punctate; anteriorly and above 

 there are small close punctures, less dense behind than before the middle as 

 in the preceding; head sparsely punctate; antennal club subequal to the 

 funicle; prothorax a fourth wider than long, the sides from base to tubulation 

 more convergent and more evenly arcuate than in either of the preceding; 

 basal lobe similar but less strongly punctate; scutellum scarcely as wide as 

 long, the surface nearly smooth, the sides and apex somewhat sinuate; elytra 

 not longer than wide, a fourth wider than the prothorax, more obtuse and 

 parabolic, the subapical elevations prominent though similarly obtuse; 

 humeri moderately prominent; lateral grooves becoming much shallower, 

 excepting the deeply exarate ninth and tenth; evenly concave abdominal 

 plaque with the coarse punctures close posteriorly, sparse basally; meta- 

 sternum with a large and deep, smooth impression; hind tibiae in the male 

 with a small cluster of longer yellow hairs within near the apex, the external 

 tooth small. Length 8.6 mm.; width 6.0 mm. Brazil (Santarem). One 

 male specimen striatus n. sp. 



Angnlicollis Boh., seems to be a species allied to truncaticollis, 

 but I am unable to identify it satisfactorily with the material at 

 hand. The prothorax in this, as well as umbonaticollis, distinguendus 

 and several others of that section, is more or less trapezoidal in form 

 when viewed postero-obliquely. The small feeble verruciform 

 elevations carrying the extremely minute punctules in such forms 

 as verrucicollis and trapezicollis , are a peculiar feature, the con- 

 stancy of which may or may not be pronounced. The male is 

 generally distinguishable from the female in this genus by the 

 slightly shorter and less arcuate, more tapering, more compressed 

 and more sculptured beak, and, in addition to this, in one large 

 section containing such species as umbonaticollis and porcinus, the 



