Brazilian Barin.-e 353 



feeble and partial in both sexes; elytra short, oval, only a little longer than 

 wide, slightly wider than the prothorax and one-half (o 71 ) to two-thirds ( 9) 

 longer; grooves deep, two-thirds as wide as the intervals, which have strong 

 and rather close-set punctures in single series; male abdomen with a large 

 flattened subglabrous basal area, which is minutely, densely punctate, the 

 prosternal spines very slender, curving upward, testaceous and three-fourths 

 as long as the prothorax. Length 2.3-2.65 mm.; width 1. 0-1.25 mm. 

 Brazil (Santarem). Six specimens rivularis n. sp. 



The above constitute probably a rather small proportion of all 

 the. Brazilian species of this very characteristic neotropical genus. 

 They occur in flowers of various species, and, as a rule, are well 

 differentiated specifically. 



In view of the identity of Limnobaroides with the present genus, 

 my remarks (Mem. Col. IX, p. 494) are irrelevant, as the Limno- 

 baroides of Champion is a Madarid and not a Barid. 



Groatus n. gen. 



The body in this genus is small, usually subcuneiform, convex 

 and partially squamulose, the prothorax large and subinflated. 

 The beak is moderately long, cylindric, feebly arcuate and longitu- 

 dinally sculptured — even in the female — and not separated by a 

 distinct impression, the mandibles small, more dehiscent and straight 

 on their inner edges. The antennae in the type are slender, sub- 

 medial, the first two funicular joints elongate, together about equal 

 to the rest, the second the shorter, the seventh only a little thicker, 

 pubescent, coronate at apex and longer than wide, the club about 

 as long as the three preceding joints, oval, not very abrupt and with 

 fine and feeble sutures. The prosternum is large, flat, very re- 

 motely separating the coxae and, in the male, has two short sub- 

 porrect spines, midway between coxae and apex, less widely sepa- 

 rated than the coxae and without intermediate depression of any 

 sort. The legs are moderate, the anterior slightly longer and with 

 short arcuate diverging tarsal claws, the anterior tibiae fimbriate 

 within in the male. The prothorax has a small and feeble tubulation 

 and small rounded basal lobe, the scutellum well developed, sub- 

 quadrate and moderately free and the elytra very moderately 

 grooved; the pygidium is very small, wider than long. The two 

 known species are as follows: 



Body cuneiform, convex, opaque, black throughout, the yellowish squamules 

 above very minute and sparse throughout and in single interstitial lines, 

 but they are large and dense at the base of all the intervals between the 

 scutellum and the feebly marked humeri; beneath, they are minute and 

 sparse, but larger and closer on the metasternum and especially on the met- 

 episterna; beak (o 71 ) moderately slender, feebly and evenly arcuate and 

 half as long as the body, the antennae exactly medial, piceous and slender; 

 prothorax almost circular, very little wider than long, the parallel sides 



T. L. Casey, Mem. Col. X. Oct. 1922. 



