154 Memoirs on the Coleoptera 



as long, broadly suboval, the sides more rounding and converging posteriad, 

 and with rather narrowly rounded apex and feeble rounded humeri, as in the 

 preceding; surface alutaceous, the grooves more shallow, but somewhat more 

 distinctly though not closely punctate; intervals three to four times as wide 

 as the striae, flat, very minutely, remotely punctulate; under surface and 

 abdomen nearly as in the preceding, except that the latter is dull rufous 

 and not piceous-black, without definite sexual characters in the type. 

 Length 2.15 mm.; width 1.15 mm. Brazil (Chapada). On flowers in the 

 clearings. May. One specimen, which has lost its head. . rufulicollis n. sp. 



4 — Form more broadly oval, convex, strongly shining, black throughout; beak 

 moderately slender, evenly arcuate, strongly sculptured, slightly longer than 

 the head and prothorax, separated from the head by a rather deeper transverse 

 line; antennae slightly behind the middle, black, the club about as long as the 

 preceding four or five joints; prothorax fully two-fifths wider than long, the 

 moderately converging sides broadly arcuate, more rounded anteriorly to 

 the large tubulation, which is half as wide as the base; surface with strong 

 punctures, somewhat close laterally, finer and sparser medially, with a 

 smooth median line; basal lobe small, gradual, its apex narrowly sinuate 

 medially; scutellum larger, wider than long, smooth, feebly concave and 

 obtrapezoidal; elytra oval, a fourth longer than wide, distinctly wider than 

 the prothorax and twice as long, the humeri moderately prominent, rounded; 

 grooves sharply marked but shallow and conspicuously punctate; intervals 

 flat, three or four times as wide as the grooves and with extremely minute, 

 sparse punctulation; sterna with rather coarse but sparse and not very deep 

 punctures, the abdomen with moderate, sparse and extremely shallow 

 punctures, impressed medially at base and at the centre of the more densely 

 punctured fifth segment in the type. Length 2.8 mm.; width 1..5 mm. 

 Brazil (Santarem). One male specimen constrictulus n. sp. 



5 — Body and legs dark brownish-rufous throughout, the beak a little darker, 

 shining, having throughout minute sparse whitish squamuk-e, rather more 

 evident beneath; beak rather thick, feebly arcuate, shining, strongly but 

 sparsely punctured, as long as the head and prothorax and distinctly sepa- 

 rated from the front; antennae submedial, nearly black, the first funicular 

 joint coronate and as long as the next three, the others compact, gradually 

 wider distally, the club oval, as long as the preceding five joints, with its 

 subequal segments not very densely puberulent and with their apices coro- 

 nate with a fine close fringe; prothorax nearly a third wider than long, the 

 sides moderately convergent and nearly straight, slightly rounding near 

 apical third to the moderately marked tubulation, which is half as wide as 

 the base; punctures rather strong and well separated, with a narrow, some- 

 what distinct smooth median line; basal lobe small, gradual, with its apex 

 narrowly truncate; scutellum small, narrow, very elongate-oval; elytra oval, 

 barely a fourth longer than wide, much wider than the prothorax and twice 

 as long, the humeri very slightly prominent and broadly rounded; apex 

 narrowly obtuse; grooves very shallow, with small and very distinct, well 

 separated punctures; intervals flat, nearly four times as wide as the grooves, 

 with extremely minute, sparse punctulation; under surface deeply, strongly 

 and closely punctate, a little less so on the abdomen, which is feebly qnd 

 basally impressed in the type. Length 1.8 mm.; width 1.0 mm. Brazil 

 (Santarem). One specimen — apparently male piceolus n. sp. 



Body and legs black; surface strongly shining, not alutaceous 6 



6 — Form rhombic-oval, convex, the upper surface almost glabrous, the strial 

 intervals with series of very minute, slender squamules, the latter not very 

 evident beneath; beak rather thick and moderately arcuate, longer than the 

 head and prothorax, with deep reentrant angle at base, strongly and some- 



