220 OMOTOTUS. 



extends obliquely upwards in the direction of (without reaching) the 

 anterior angles, and gives a distinctly gibbous appearance to the 

 anterior and medial portions of the disk; this prominent anterior 

 eminence is sharply and deeply bisected by a broad longitudinal 

 furrow : the surface is finely fiavo- or rufo-pubescent throughout. 

 Scutellum triangular, impunctate, fuscous. Elytra broader than the 

 thorax, robust, punctate-striate, the punctures and almost the stria) 

 being concealed by an irregular but thick pubescence ; the surface is 

 marked throughout by slight elevations and depressions : anteme- 

 dially a broad shallow depression extends obliquely upwards towards 

 the anterior angles ; the anterior angles themselves are prominently 

 gibbous ; the scutellary surface is raised ; and (when viewed from 

 behind) two obsolete circular elevations are apparent postmedially, 

 one on either side of the suture. Antennae subincrassated towards 

 the apex ; the first joint broad, ovate ; the second much shorter and 

 narrower than the first ; the third to the sixth fine, and of length 

 equal to the first ; the seventh to the eleventh dilated, broader than 

 the first and hardly longer than the second ; in colour, the first to 

 the sixth flavous, the seventh and the eighth of a paler testaceous 

 colour, the ninth to the eleventh pale fuscous. Legs : the anterior 

 flavous throughout ; the posterior fuscous, the tarsi being flavous, 

 and the globular inflation of the posterior claw brightly rufo- 

 fuscous. 



From 0. bltuberctdatus this species may be separated by the more 

 piceous and differently distributed colouring on tbe elytra, and by its 

 more prominently globose scutellary angles ; from 0. /meatus it dif- 

 fers by its thick pubescence, and from 0. ftdvo-pubescens by the 

 irregularly coloured (not concolorous) pubescence on the elytra. 



Cayenne. 



12. Omototus fuscatus. 



0. ovatus, latus, robustus, sxd)pubescens, fusco-piceus ; thorace qua- 

 drato, rectangular!, cluobus antemedus tuberculis notato, ad latera 

 et ad medium, longitadinaliter, jiavo-pubescenti ; elytrls latis, 

 robustis, valde punetato-striatis, subpubescentibus ; antennis ro- 

 bustis, ad apicem incrassatis, jiavis, art. 5, 6 et 9-11 fusco- 

 ferrugineis; pedibus anticis jiavis, posticis fuscis, tarsis tibiisque 

 ad basin rufo-fuseis. 



Long. corp. 2 lin., lat. li lin. 



Ovate, broad, robust, subpubescent, fusco-piceous. Head short, 

 slightly produced ; below the base of the antennae is a transverse 

 ridge ; eyes large and prominent ; the surface of the head flavo- 

 subpubescent. Thorax quadrate, rectangular ; the anterior angles 



