474 Memoirs on the Coleoptera 



abdomen with a large shallow elongate-oval basal impression, the sinus of 

 the fifth segment very shallow, but with an unusually broad truncate median 

 projection. Length 5.9-8.0 mm.; width 3.5-4.4 mm. Brazil (Chapada). 

 October. Eight specimens delecta n. sp. 



The peculiar and very constant elytral sculpture in this genus is 

 a valid generic character, separating the species at a glance from 

 those of Sclerobaris; it is, however, somewhat similar to that of 

 Megalobaris, which differs in several important features relating to 

 the antennae and prosternum, as shown in the table of genera. 

 Delecta is probably allied to Baridius parellinus Boh., but there is 

 no trace of the very smooth median thoracic line of that species. 



Cymatobaris n. gen. 



Again it is a radical divergence in the scheme of sculpture, which 

 constitutes one of the primal generic features of a small group of 

 species separated under the above name. The body is smaller than 

 in any of the preceding genera and of oblong form, the elytra very 

 conspicuously undulated and with very fine but sharply defined, 

 wholly impunctate striae. The beak also is peculiar, although 

 approached by consessor of the preceding genus, in being very short 

 and thick, with its upper profile strongly arcuate, making the 

 reentrant angle separating it from the head rather more distinct, 

 though very obtuse. Antennae medial, the scape short; first 

 funicular joint cylindric and as long as the next two, the outer 

 joints short, transverse, increasing in width and obtrapezoidal in 

 form, the club thick, obtusely conoidal and as long as the three or 

 four preceding joints, glabrous or nearly so basally. Prosternum 

 short, broadly and feebly concave, separating the coxae by two- 

 thirds their width, with the posterior lobe moderate in size but 

 transverse and conspicuously tumid. Legs rather short, simple, 

 the tarsi rather slender, with very moderate and slender claws. 

 Pro'thorax strongly gibbous in lateral profile, tubulate at apex and 

 with somewhat prominent rounded basal lobe, the scutellum trans- 

 versely quadrate and smooth. Pygidium sharply and evenly cari- 

 nate along the middle (9), less so and rather tumid (o 71 ). The 

 under surface is glabrous, each puncture having only an extremely 

 minute slender seta. The species known to me are as follows: 



Body bright steel-blue throughout, shining, the abdomen blacker; beak (9) 

 black, not three times as long as wide, two-thirds as long as the prothorax, 

 strongly, loosely punctate, more finely distad; antennae short, piceous-black; 

 prothorax even in convexity, not foveate, short, one-half wider than long, 

 the sides parallel basally, evenly rounded beyond the middle to the large 

 tubulation, which is not quite half as wide as the base; punctures coarse, 

 unevenly close laterally, more or less remote elsewhere, those bordering a 

 feebly defined smooth line not so coarse; elytra oblong, with nearly parallel 



