248 Memoirs on the Coleoptera 



slender, gradually thickening basally, shining, sculptured and squamulose at 

 the sides basally, separated from the head by a shallow reentrant angle, sub- 

 similar in the sexes, as long as the elytra ( 9 ), slightly shorter (o 71 ); antennae 

 long, slender, rufous, very slightly behind the middle in both sexes, the first 

 funicular joint notably long and longer than the next two; club long, narrowly 

 oval and with deep sutures; prothorax a third wider than long, the sides 

 just visibly converging and nearly straight, rounding and oblique beyond the 

 middle, the truncate apex less than half as wide as the base; punctures and 

 transverse bright fulvous scales dense; elytra long and triangular, with 

 moderately arcuate sides and narrowly rounded apex, fully three-sevenths 

 longer than wide and evidently more than twice as long as the prothorax; 

 grooves rather fine; intervals with a series of strong punctures along each 

 side adjoining the grooves; male with the abdomen barely visibly impressed 

 but scarcely less squamulose medio-basally; presternum with long and very 

 dense, shaggy vestiture and a deep transverse constriction just before the 

 middle, immediately behind which are two very short erect spines, not as 

 long as the thickness of the femur. Length 3.3-3.8 mm.; width 1. 75-1. 85 

 mm. Brazil (Santarem). Two specimens auricollis n. sp. 



V — Body elongate, rhombic-suboval, black, the legs rather long but less slender 

 than in the preceding and black; transverse fulvous pronotal squamules 

 more slender and more widely separated, very even throughout; elytra 

 with the long slender squamules sparsely scattered basally, whiter and dense 

 on the scutellum, white' and sparse in a broad median fascia and, suturally, 

 to the apex, and with a small dense discal spot between posterior fifth and 

 sixth; beak evenly and moderately arcuate, shining and nearly smooth in 

 both sexes, gradually slightly thickened at the extreme base, moderately 

 slender and a little shorter than the elytra (o 71 ), very slender but dorsally 

 flattened distally, and a little longer than the elytra ( 9 ) ; antennae piceous 

 and slender, with unusually elongate suboval club, all the funicular joints 

 elongate (o 71 ), or less elongate ( 9), the first joint fully as long as the next 

 two in both sexes; prothorax less (a 71 ) or more (9) than a fourth wider 

 than long, the converging sides nearly straight for three-fifths, then rounding 

 gradually to a pronounced tubulation, truncate and half as wide as the base 

 ( 9 ) or less (o 71 ) ; punctures dense throughout; elytra triangular, a third ( 9 ) 

 to three-sevenths (a 71 ) longer than wide, the sides feebly arcuate, with rather 

 narrowly rounded tip (o 71 ), or much more arcuate, with similar tip (9), 

 twice as long as the prothorax ( 9 ), more (o 71 ); grooves moderate; intervals 

 with moderate and close, confused punctures, the dark squamules blackish; 

 under surface and legs with close and even, whitish squamules; male with 

 the abdomen feebly impressed and less squamulose medio-basally. Length 

 3.8-4.0 mm.; width 1. 85-1 .95 mm. Brazil (Chapada). March and No- 

 vember. Seven specimens, found on flowers in forest clearings. 



longicornis n. sp. 



VI — Larger species, always much over 3 mm. in length; presternum flat, not 

 transversely constricted, the scales largely radiating from a central point. . 2 



Small species, generally gregarious on flowers in forest, clearings; prosternum 

 feebly impressed, transversely constricted, the scales all arranged longitu- 

 dinally 4 



2 — Scutellum well developed, more or less densely squamulose as usual. Whitish 

 vestiture, dense with the suture — posteriorly expanded slightly at apical 

 fourth — and two small attendant spots just before the middle, denuded, 

 but sometimes obsolescent through encroachment of the scaly covering, 

 though never completely disappearing; under surface with a dense crust of 

 white scales; sexual characters apparently almost wanting, the male abdo- 

 men very feebly impressed medio-basally, though not less squamose, the 



