308 Memoirs on the Coleoptera 



Body almost similar in nearly all respects, but a little smaller and still more 

 slender; beak (9) still somewhat shorter, more evenly, feebly arcuate, 

 similarly separated from the head by a rather evident impression; prothorax 

 fully a fourth wider than long, the parallel sides less rapidly rounding anteri- 

 orly — in about apical two-fifths, the apex similar; punctures similar but 

 rather sparser; scutellum more minute, quadrate; elytra nearly similar 

 in every way, except that they are more nearly three times as long as the 

 prothorax and with the humeri somewhat more obtuse; abdomen similarly 

 minutely and remotely punctate; the apparent male is similar to the female, 

 except that the beak is more slender and distinctly shorter than the prothorax, 

 but the abdomen is without trace of basal impression. Length 2.25-2.55 

 mm.; width 0.7-0.85 mm. Brazil (Santarem). Five specimens. 



angustulus n. sp. 



3 — Form narrow and elongate, slightly more oval than in the preceding species, 

 piceous-black, the elytra and legs more rufous; surface glabrous and polished, 

 each of the coarse punctures of the under surface with a distinct slender 

 squamule, these not closer on the met-episterna; beak (9) short, very 

 slender, cylindric, evenly and more distinctly arcuate than in the preceding 

 types, and only as long as the prothorax, the antennas medial; prothorax a 

 fourth or fifth wider than long, the sides parallel and straight, rapidly round- 

 ing in apical fourth or fifth, the faintly tubulate truncate apex distinctly 

 more than half as wide as the base; punctures deep, moderate in size, sepa- 

 rated by about twice their diameters, a little coarser and closer laterally; 

 median smooth line partial; scutellum larger, as wide as long, obtrapezoidal 

 and broadly concave; elytra two-thirds longer than wide, a fourth wider 

 than the prothorax and two and one-half times as long, the sides not parallel 

 as in all the preceding, but feebly oblique and slightly arcuate, the apex 

 more obtusely rounded; humeri slightly prominent; grooves a third or 

 more as wide as the very smooth intervals, which are narrower laterad; 

 abdomen convex, with medially obsolete first suture, the punctures rather 

 coarse but shallow and sparse, each with a conspicuous linear white squamule. 

 Length 2.5 mm.; width 0.85 mm. Brazil (Chapada — forest). October. 

 One specimen punctiventris n. sp. 



The species of the piceolus section are closely allied among them- 

 selves, but seem to be distinct as defined above ; the Chapada and 

 Santarem species form two rather definite sections of the genus. 



Microtorcus n. gen. 



The body in this genus is very small, slender, parallel, somewhat 

 convex and only moderately shining. The beak, in the male at 

 least, is short, slender, very evenly cylindric and separated from 

 the head by an evident though moderate sulcus. Antennae just 

 beyond the middle and notably short, the scrobes but feebly oblique, 

 the first funicular joint about as long as the next three, the outer 

 joints gradually wider and compactly joined, the club large, oval, 

 gradual and as long as the five preceding joints, its first segment 

 more than half the mass. The prosternum is flat, gradually concave 

 apically, not spinose in the male and separates the very moderate 

 coxae by rather more than half their width. The legs are normal 

 throughout but somewhat short, the prothorax abruptly tubulate 



