Brazilian Barlnme 15 



loose and faintly denned sublateral line, and are also visible along the apex 

 and base and in a very fine and feeble median line; under surface with 

 uniform sparse slender squamules; beak only feebly arcuate, rather slender, 

 as long as the head and prothorax (9), a little shorter (cf); prothorax a 

 fourth to third wider than long, the sides converging and broadly arcuate 

 from base to the feeble apical constriction; punctures very dense; scutellum 

 a little wider than long, trapezoidal, with rounded apex and with but few 

 punctures; elytra oval, a third wider than the prothorax, narrowly rounded 

 at apex as usual; humeri obtusely prominent; striae rather coarse, very 

 deep; intervals shining, sparsely, asperately punctulate. Length (c?9) 

 2.1-2.2 mm.; width 0.85 mm. Brazil (Santarem). Four examples. 



suffusus n. sp. 

 Form nearly similar but with smaller prothorax, black, the legs bright, the 

 antennae duller, rufous; white squamules of the elytra very small, sparse 

 and uniform throughout, without condensations; on the prothorax they are 

 somewhat condensed toward the sides throughout; on the under surface the 

 scales are larger, white and rather dense throughout; beak feebly arcuate, 

 a little shorter (d 1 ) or longer (9) than the head and prothorax; antennae 

 well beyond the middle as usual; prothorax only a fifth or sixth wider than 

 long, the sides subparallel, feebly arcuate, more rounding and converging 

 beyond the middle, the punctures very dense; scutellum small, rather wider 

 than long, obtusely rounded at apex; elytra attenuately oval, with obtuse 

 and well exposed but scarcely prominent humeri, a fourth longer than wide 

 and almost one-half wider than the prothorax; striae very deep but not 

 notably coarse; intervals flat, wider than in suffusus and, at the sides, not 

 carinulate as usual in the genus. Length (<? 9) 1.7-1.8 mm.; width 0.78 

 mm. Brazil (Chapada). March and October. Seven examples. 



simplex n. sp. 



The species of this genus are among the smallest of the subfamily, 

 they are however very well defined and there are no doubtful cases 

 included in the material at hand. The small spicule of the femora 

 is rather constant and always rather inconspicuous, but in simplex 

 it is very minute and less evident than in the slender larger and 

 spiniform development seen in suffusus. 



Omogonia n. gen. 



The species of this genus are very much larger than those of 

 Cyrionyx and of a different form, having a relatively smaller pro- 

 thorax and widely exposed and laterally notably prominent humeri; 

 they are also characterized by having most of the strial intervals 

 carinate, often unevenly or unequally. The beak is well developed, 

 the antennae at the middle, with the club subglobular, pointed and 

 moderate in size, with its first segment fully half the mass or more, 

 the second funicular joint frequently longer than the first; the 

 femora are narrow and are feebly dentate beneath. The type may 

 be described as follows : 



Omogonia ruficornis n. sp. — -Rather stout, convex, the pronotum gradually 

 and simply humped and arcuate medially in profile; color piceous-black, the 

 tibiae and tarsi rufescent, the antennae rufous; surface shining; vestiture of 



