172 Memoirs on the Coleoptera 



scutellum quadrate, flat, arcuate behind, and not truncate as in the preceding; 

 elytra narrower, a third longer than wide, oval, much less broadly obtuse at 

 apex and three-fifths longer than the prothorax, the grooves finer, only two- 

 thirds as wide as in convexiventris, the interstitial punctulation much less 

 obvious, subobsolete, feebly visible laterally; abdomen very convex, remotely 

 and infinitesimally punctulate. Length 5.0 mm.; width 2.2 mm. Brazil 

 (Chapada — forest). November. One female atropolita n. sp. 



These species adhere closely to the norm of the genus. The 

 sexual characters in the form of the prothorax in oblongiila, are 

 very remarkable if the sexes are truly identified, as now seems 

 evident, and are all the more singular when we consider that the 

 form of the anterior part of the prothorax in the female of atropolita 

 and convexiventris is almost exactly as in the male of oblongiila, 

 and not at all as in the female of that species; perhaps there is 

 some mistake of identification, which the very scanty material will 

 not enable me to correct at present. 



Stethobaropsis n. gen. 



The general form of the very moderate body in this genus is oval, 

 somewhat as in Stethobaris, but beyond this there is little or no 

 affinity. The surface is subglabrous, shining, black, very moder- 

 ately sculptured, the elytra with fine, sparse, lineiform squamules, 

 generally dark in color; the rather strong punctures of the under 

 surface each has a minute and inconspicuous squamule. The beak 

 is moderately thick and arcuate, strongly sculptured, feebly tapering 

 and compressed and is subcariniform above, separated from the 

 head by a very feeble impression, the mandibles strongly dentate 

 but somewhat prominent when closed. Antennae slightly behind 

 the middle, the funicular joints compactly joined and gradually 

 broader, so that the last is about as broad as the club, the first as 

 long as the next three; the club is oval and moderate. The 

 prosternum is excavated anteriorly, the excavation gradually shal- 

 lower and finally lost before the coxae, which are rather widely 

 separated. The legs are moderately short, somewhat strongly, 

 closely sculptured, the femora mutic and the tarsal claws free and 

 divergent. The scutellum is small, flat, ogival and in rather close 

 contact as a rule. The four species at hand are as follows: 



Basal lobe of the prothorax deeply sinuate medially at apex. Form oval, convex, 

 polished black throughout, nearly glabrous, the elytra with fine and sparse, 

 dark brown hair-like squamules, with a few paler at each side of the scutellum ; 

 beak strongly, evenly arcuate, as long as the head and prothorax, slightly 

 tapering from base to apex and coarsely, strongly sculptured, less coarsely 

 and more discretely punctate above; prothorax two-fifths wider than long, 

 the sides rather strongly converging and strongly, subevenly arcuate from 

 base virtually to apex, there being only a very short and nearly obsolete 

 constriction, the truncate apex three-sevenths as wide as the base; surface 



