Brazilian Barin.e 65 



not distributed throughout the surface, but leaving a well defined smooth 

 border. Length 3.9 mm.; width 2.8 mm. Brazil (Chapada). March. 

 One female impressibasis n. sp. 



Body throughout nearly as in the preceding, but somewhat narrower and not 

 quite so large, the prothorax a fourth wider than long, but otherwise almost 

 similar; beak in the female as in the preceding, but rather more compressed 

 at the sides, the antennal club a little longer; scutellum smaller, evenly 

 quadrate and not wider than long, concave as usual; elytra similar, but with 

 still more broadly rounded humeri and more punctate striae; mes-epimera 

 having the still coarser punctures scattered over the entire surface; subbasal 

 external elevation of the hind tibiae in the form of a large and well defined 

 triangular tooth; beak in the male similar to that of the female but shorter. 

 Length 3.5-3.6 mm.; width 2.4-2.5 mm. Brazil (Chapada). March. 



semiruber n. sp. 



7 — Form more rhombic-oval, the pronotum more steeply sloping anteriorly; 

 lustre and coloration similar, except that the piceous elytra become nubilously 

 rufous at the humeri; beak much less stout, two-thirds as long as the pro- 

 thorax, straight, feebly arcuate distally, finely, very closely strigato-punctate 

 throughout, extending onto the head, the frontal fovea very minute and 

 feeble; antennal club as usual, as long as the five preceding joints, the first 

 funicular joint unusually slender, three times as long as wide; prothorax 

 not a fourth wider than long, the sides converging rather strongly and evenly 

 arcuate from base to tubulation, which is less than a third as wide as the base; 

 entire flanks beneath with shallow and sublunate punctures, becoming fine 

 and sparse upwardly though a part of the pronotal sides; basal lobe closely 

 and strongly punctate, truncate at tip, not laterally impressed; scutellum 

 punctate; elytra relatively wider, fully a fifth wider than the prothorax, with 

 broadly rounded and slightly prominent humeri, slightly longer than wide, 

 parabolic; striae rather coarse and grooved suturally, fine and more distinctly 

 punctate laterally, excepting, as usual, the coarse ninth and tenth, the sutural 

 rather broad and more distinctly punctate basally; mes-epimera coarsely 

 and sparsely but shallowly punctate; abdomen not distinctly tumid, but 

 closely, strongly punctate and medially broadly impressed on the basal 

 segment; external tibial tooth broad, with its apex finely aciculate and promi- 

 nent. Length 3.5 mm.; width 2.3 mm. Brazil (Chapada). March. A 

 single male angustinasus n. sp. 



The above forms adhere very closely to a common type of color- 

 ation and general habitus, and it is quite possible that several of 

 them may not maintain a fully specific status; the material is not 

 sufficient to decide this at present. They are all from the same 

 region and most of them were taken in the same season of the year; 

 the case is somewhat similar to that of Haplostethops ellipsoidea and 

 related species (Mem. Col., IX, p. 496) in these respects. There 

 are some radical differences in the form of the tumidity at the base 

 of the abdomen, which feature clearly delimits certain groups, and 

 these abdominal characters, as in Diorymeriis, are apparently not 

 affected materially by the sex of the individual; sexual differences 

 are very slight and, so far as can be observed, affect only the form 

 of the beak. 



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



