Brazilian Baring 4 8 5 



throughout the posterior lobe, which is narrow, prominent, distinctly- 

 concave, with its apex deeply and semicircularly emarginate and 

 having rather sharp angles, the coxae separated by slightly less than 

 their width. Prothorax constricted and tubulate at apex, the 

 basal lobe short, gradual and narrowly rounded, the scutellum 

 closely fitted, wider than long, ogival and sinuate at base, the 

 elytra grooved, not undulate and the pygidium well developed, 

 semicircular, feebly convex and with deep separated punctures. 

 Legs moderate, the anterior femora deeply sinuate beneath near 

 the apex, the tarsal claws slender, well separated and divergent. 

 The type is the following: 



Mesothanius emarginatus n. sp. — Elongate-suboval, convex, deep black and 

 polished throughout; beak a little shorter than the prothorax, feebly arcuate, 

 the antenna; piceous; prothorax a third wider than long, the sides feebly con- 

 verging and nearly straight, rounding slightly only at the constriction, the tubu- 

 lation four-sevenths as wide as the base, the basal angles rounded; punctures 

 moderate, sparse, coarse but separated by their own widths laterally, wholly 

 wanting toward base except at the sides, the median impunctate area not well 

 defined; elytra a third longer than wide, not quite parallel, rapidly obtusely 

 rounded at apex, evidently wider than the prothorax and more than twice as 

 long, the humeral swellings very feeble; grooves and intervals nearly as in the 

 preceding species. Length 3.3 mm.; width 1.35 mm. Brazil (Petropohs). 

 Desbrochers des Loges. One specimen. 



The remarkable prosternum and, especially, its posterior lobe, 

 will render the identification of this genus quite certain. 



The four preceding genera constitute a group, the Thaniids, 

 analogous, among the genera with well separated and diverging 

 ungues, to the Pseudobarids, which always have connate or contig- 

 uous claws. 



Baptobaris n. gen. 



The size of the body is much greater in the present genus than 

 in any of those immediately preceding, including Glyptobaridia, and 

 is elongate, parallel and usually, but not always, with distinctly 

 undulate elytra. The beak is short, thick, strongly arcuate and 

 strongly and closely but discretely punctate, the antenna rather 

 behind the middle, with the outer funicular joints broader, the 

 club ovoidal, somewhat compressed and with more or less oblique 

 sutures, the basal segment less than half the mass and glabrous. 

 Prosternum with the channel impressed, deep, but not very sharply 

 defined at the sides, the coxae moderately separated and the posterior 

 lobe truncate or feebly sinuate. Prothorax feebly tubulate, the 

 basal lobe in the form of a very short and gradually formed obtuse 

 cusp, the scutellum free and quadrate, the elytra grooved and the 

 pygidium moderate, usually nearly flat, with more or less evident 



