^ OMOTOTUS. 221 



depressed ; the sides slightly marginate ; the antemedial surface is 

 raised and longitudinally foveolated, thus forming two obsolete broad 

 tubercles ; the surface is clothed with pubescence, a medial longitu- 

 dinal line and also the sides being flavo-pubescent. Scutellum trian- 

 gular, impunctate. Elytra broad, robust, deeply punctate-striate, 

 clothed (more sparingly than the thorax) with indistinct pubescence. 

 Antennce short, tolerably robust, incrassated at the apex ; flavous, 

 with the fifth, sixth, and ninth to eleventh joints fusco-ferrugineous. 

 Legs : the anterior flavous ; the posterior fuscous (the tarsi and the 

 base of the tibiae being rufo-fuscous) ; the globular inflation of the 

 posterior claw bright rufous. 



A single specimen was taken at Santarem (River Amazon) by 

 Mr. Bates. 



13. Omototus bimaculatus. 



0. oblongo-ovalis, luridus, flavo pilo holosericeo omnino vestitus ; 

 capite subproducto, punctato ; thorace transverso, marginato, ad 

 basin paulo attenuate ; elytris robustis, punctato-striatis, bima- 

 culatis (maculce nigrce rotundatce parvce) ; antennis robustis, art. 

 69 dilatatis, nigris, religuis flavis ; pedibus subpubescentibus, 

 flavis. 



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



Oblong- oval, broad, robust, parallel, covered throughout with a 

 short and thick yellow pubescence. Head short, transverse ; below 

 the insertion of the antennae is a transverse triangular depression : 

 eyes large, situated at the base of the head, not extending laterally 

 so far as the angles of the thorax ; between the eyes is an obsolete 

 oblique fovea in the form of the letter V : the surface is finely punc- 

 tate. Thorax transverse ; the anterior angles depressed and slightly 

 rounded; the sides marginate, more especially near the anterior 

 angles ; surface equate. Scutellum triangular, fuscous. Elytra broad, 

 subparallel, robust, punctate-striate, with two slightly raised black 

 pubescent spots (small and circular) placed medially between the 

 third and fourth striae. Antennae short and robust; the first and 

 second joints much dilated, the third to fifth slender, the sixth to 

 ninth short and dilated ; in colour, the first to fifth are flavous, the 

 sixth to eighth black, the ninth to eleventh flavous. Legs flavous 

 throughout, and slightly pubescent ; the base of the posterior femora 

 black. 



This species may be separated from those of its congeners, to which 

 it nearly approaches, by its larger size, and by the constriction of the 

 sides at the base of the thorax. 



