500 Memoirs on the Coleoptera 



lobe vestigial or very small, the scutellum free, small, subquadrate 

 and more or less impressed, the elytra with coarse striae, which are 

 strongly punctured, each puncture bearing a whitish scale as a rule, 

 coarsely exarate at apex. The pygidium is short, circularly rounded, 

 subvertical and strongly, densely punctate. The legs are rather 

 short and stout, the tarsi dilated and the claws small and connate. 

 Sexual characters are nowhere apparent in any of the three species 

 in my collection, which may be described as follows: 



Body parallel, convex, black throughout, with somewhat piceous legs, rather 

 shining, the scales yellowish to white, narrow and evenly somewhat close-set 

 on the pronotum, finer, sparser and gradually disappearing medially on the 

 pronotum, sparse- on the elytra, very fine in the striae, small and sparse 

 beneath, larger and closer toward the sides of the abdomen and large and 

 dense on the met-episterna; beak finely, sparsely punctate, equal in diameter 

 throughout, but thicker at the actual base, toward which the punctures are 

 coarser and squamulose, almost three-fourths as long as the prothorax; 

 antennae dark rufous; prothorax very slightly longer than wide, the sides 

 parallel and nearly straight, rapidly and evenly rounding in about apical 

 fourth, the truncate apex half as wide as the base; punctures coarse, longi- 

 tudinally confluent at the sides, well separated medially, with a simple 

 impunctate line not attaining the apex; elytra two and one-half times as 

 long as wide, two and a third times as long as the prothorax and equal in 

 width, the sides parallel and straight, converging and arcuate in less than 

 posterior third to the narrowly obtuse apex; striae fully a third as wide as 

 the intervals, strongly and closely punctate, the intervals loosely rugulose 

 and moderately punctate. Length 6.65-6.7 mm.; width 1.85 mm. Brazil 

 (Santarem). One specimen. Another specimen, from the same locality, 

 resembles the type in every way, except that the prothorax is exactly as long 

 as wide, with the truncate apex distinctly more than half as wide as the 

 base; perhaps this may prove to be the female quadricollis n. sp. 



Body similarly parallel and sparsely squamulose, more feebly shining and less 

 coarsely sculptured, black, the elytra faintly picescent; squamules of the 

 pronotum similarly arranged but still smaller, more slender and sparser, 

 those of the elytra nearly similar, sparse, rather long, slender and whitish, 

 those of the strial punctures very small and tenuous; whitish squamules 

 beneath nearly similar; beak almost similar in every way, fully three-fourths 

 as long as the prothorax; antennae rufous, blackish distally; prothorax just 

 visibly longer than wide, the parallel sides feebly arcuate, more gradually 

 rounding anteriad in nearly apical third, the truncate apex somewhat more 

 than half as wide as the base, which is narrower than the disk; punctures 

 much less coarse but conspicuous, rather coarse and longitudinally confluent 

 at the sides, less coarse and uneven but generally separated by about their 

 widths medially, the impunctate line biabbreviated; elytra nearly as in the 

 preceding; tarsi dilated as usual. Length 7.4 mm.; width 2.05 mm. Gua- 

 temala (Yzabal — elev. 100 ft.). One specimen guatemalensis n. sp. 



Body of nearly similar parallel form, but with anteriorly dilated prothorax, the 

 coloration and vestiture very nearly as in the two preceding, the integuments 

 rather piceous-black, with obscure rufous legs; beak notably short, slender, 

 cylindric, finely, sparsely punctate, more coarsely at the slightly expanded 

 base, feebly bent at the antennae and scarcely two-thirds as long as the 

 prothorax, the antennae obscure rufous; prothorax a fourth longer than the 

 basal width, the sides slightly diverging and straight, evenly rounding in 



