216 0M0T0TUS. 



minute, triangular, impunctate, fuscous. Elytra considerably broader 

 than the thorax, robust, short, punctate -striate, the striae being 

 shallow and almost concealed by a thick irregular pubescence, and 

 the punctures being regular and more distinct ; the surface is clothed 

 with a thick fiavo-fuscous pubescence, irregularly mottled with 

 flavous and ashy-grey : an antemedial transverse obsolete depression 

 extends obliquely upwards to the outer margins of the humeral 

 angles, thus giving an appearance of prominence to the surface near 

 the scutellary angles ; the extreme apex of the humeral angles also 

 is subprominent, causing the striae near it to be slightly sinuate. 

 Antennae sufficiently fine, subincrassated towards the apex ; the third 

 joint is very considerably longer than any of the others, and the 

 basal joints of the same breadth as the first ; in colour, the joints first 

 to fourth are flavous, fifth and sixth rufo-fuscous, seventh and eighth 

 testaceous, and ninth to eleventh fuscous. Legs flavous, the anterior 

 tarsi and posterior femora being suffused with fuscous, and the 

 posterior tibia? and tarsi rufo-fuscous. 



This species approaches 0. Dohrnii in form and general character ; 

 it is, however (besides the less piceous and more flavous colour of its 

 pubescence), shorter and more robust, and the basal depression of 

 the thorax is broader and more distinctly defined. From 0. nodosus 

 it differs also in its shorter form and in the different arrangement 

 of markings on the head, and its less prominently bituberculated 

 thoracic disk. From other species of the group (all of which re- 

 semble each other more or less in general appearance) it may be 

 separated by its manifest difference in size. 



Cayenne. In the collection of M. Chevrolat. 



8. Omototus Cayensis. 



0. oblongo-ovatus, lotus, robustus, punctato-striatus, fasco- et fuho- 

 pubescais ; capite brevi, inter oculos trcoisverse depresso, ad basin 

 rufo-jiavo, fiavo-pvhescenti ; thorace transverso, rectangtdari, 

 laterihus marginatis, antice globoso, bihiberculato, ad angulos 

 basales depresso ; elytris latis, punctato-striatis, ad scutellum 

 gibbosis, fulvo- aid fusco- irregulariter pubescentibus : an tennis 

 subincrassatis, art. 1-4 et 7 et 8Jtavo-testaceis, 5, 6, 9-11 fuscis ; 

 pedibus anteriflribus flavis, tarsis tibiarumque apicibus fnsco 

 suffasis. 



Long. corp. 2 lin., lat. 1 lin. 



Oblong-ovate, broad, robust, punetatc-striate, clothed throughout 

 with a fine but close fuscous or fulvous pubescence. Head short, 

 transverse, depressed, not produced in front ; above the labium is a 



