8 Memoirs on the Coleoftera 



Pronotum uniformly opaculate and punctured 2 



Pronotum with latero-basal smooth polished spaces 5 



2:— Elytra with a large area devoid of white tessellation but covered densely 

 with uniform yellow-brown squamules; body stouter. Beak short, stout, 

 perfectly cylindric, not as long as the prothorax, which is nearly a third 

 wider than long, convex, the sides parallel in basal, converging in apical, 

 half; surface in great part clothed densely with uniform fulvous linear 

 squamules, with some white specks sparsely scattered and some dense white 

 areas antero-laterally; scutellum quadrate, polished and glabrous; elytra 

 two-fifths wider than the prothorax and between two and three times as 

 long, the striee fine and impunctate; intervals flat, the seventh strongly 

 carinate from the humeri to the moderate subapical umbo, 1-3 rather more 

 finely carinulate apically and 5 just before the apical umbo; under surface 

 with close and unevenly condensed white scales. Length ( 9 ) 7-5-7-7 mm.: 

 width 3.8 mm. Bolivia (Yungas de la Paz, 1000 m. elev.), — H. Rolle. 



latiusculus n. sp. 



Elytra without large area of fulvous vestiture, the scattered tessellation of white 

 pubescence extending throughout but with more or less irregularity 3 



3 — Beak thicker, distinctly larger than the femora, almost as long as the pro- 

 thorax, a little shorter in the male. Body nearly as in the preceding but 

 smaller and less stout, darker areas generally with a few scattered fulvous 

 squamules; antennae black as usual; prothorax two-fifths wider than long, 

 the parallel sides nearly straight, oblique anteriorly; discal part velvety- 

 black, with a few scattered points and the median line at base of white 

 squamules, these also sparse but distinct at the sides and apex, with a few 

 more condensed areas; scutellum parallel, slightly transverse, broadly arcuate 

 behind; elytra narrowing from the humeri as usual, more rapidly at apex, 

 abruptly much wider than the prothorax, the darker areas velvety-black; 

 striae fine; intervals 7 and 9 strongly carinate from the humeri not quite to 

 the apex, 8 more finely carinulate; posterior carinule of the third meeting 

 that of the ninth near apex. Length (d" 9 ) 6.7-7.3 mm.; width 3.0-3.2 mm. 

 Cayenne and Amazon Valley (Santarem) irroratus Fabr. 



Beak less thick, scarcely stouter than the femora, relatively somewhat more 

 elongate, being slightly longer than the prothorax 4 



4 — Body smaller and narrower than in irroratus but otherwise nearly similar 

 throughout, the central part of the elytra with more numerous diffused 

 fulvous squamules in a small area at each side of the suture; prothorax less 

 transverse, only slightly wider than long, the sides obtusely subprominent 

 at the middle, thence parallel and feebly sinuate to the base, subsinuously 

 oblique in fully apical half; velvety-black median area with a few white 

 points, the median line with diffused white squamules, becoming fulvous and 

 broadly interrupted at the middle; scutellum punctulate and with a few 

 small fulvous squamules, wider than long, parallel, circularly rounded at 

 apex; elytra nearly one-half wider than the prothorax, of the usual outline 

 and fine striation, the carinules almost obsolete, excepting the two extending 

 from the humeri to the obsolescent umbo, and also that on the third interval 

 toward apex. Length ( 9 ) 5-8 mm.; width 2.6 mm. LTpper Amazon Basin 

 (Chanchomayo) incertus n. sp. 



Body nearly as in the preceding but a little larger, deep black, more shining; 

 beak decidedly longer than the prothorax, the latter shorter and more 

 transverse, fully a third wider than long, the sides at the middle obtusely 

 but still more strongly prominent, sinuate thence to the base, rapidly straight 

 and oblique in exactly apical half; surface finely, not densely punctate, with 

 feebly elevated median line; scutellum smaller, narrower, quadrate, with 

 rounded angles; elytra abruptly much wider than the prothorax, of the 



