300 Mr. II. W. Bates on Ccruinbi/ciJir 



Long. 0:} lin. S . 



One of the species which resemble the genus Gnoma in 

 the curious form of the thorax narrowed in the middle. 

 The whole surface is glossy, and of a reddish-chesnut 

 hue. On the middle of the thorax are two small spines 

 or very acute tubercles, and behind, near the hind mar- 

 gin, are two obtuse rounded tubercles. The yellow lines 

 on the elytra are about one-fifth the length of the -vNang- 

 cases, and lie a little obliquely, the lower end being near 

 the suture. 



Hah. — Kiver Tapajos. 



7. Ihidion sulciconic. 



White, Cat. Longic. Brit. Mus. p. 232. 



Elongatum, robustum, ferrugineum ; thorace eequali, 

 nudo, opaco; elytris nitidis, passim punctulatis,apice uni- 

 spinosis, toto disco nigricante, linea longitudinali ante 

 medium suturae parallela, altera pone medium obliqua 

 pallidis ; pedibus robustis, femoribus grosse clavatis ; 

 antennis ((^) articulo 3io reliquis latiori et cum 4to et 

 6to carinato et bisulcato. 



Long. 6 lin. c?. 



Hab. — River Tapajos. 



8. Ihidion sphceriinum, n. sp. 



Facies Perihoei {Sphcerunarum) , castaneo-fuscum, ni- 

 tidum ; capite grosse confluenter punctato ; thorace elon- 

 gate, medio paulo latiori, subnitido, tenuiter tomentoso, 

 punctulato et punctis nonnullis magnis setiferis ; elytris 

 apice sinuato-truncatis, bispinosis, spina suturali minori, 

 supra politis, punctis setiferis seriatim ordinatis, interstitiis 

 sparsim punctulatis ; antennis sparsim setosis, articulis 

 3io et 4to carinatis; pedibus curtis, femoribus valde 

 clavatis. 



Long. 4^ lin. $ . 



In its shining concolorous dark chesnut hue, without 

 pale markings, and its bispinous elytra, this resembles 

 species of Pcrlhoeum in the sub-family Sphceriince, but 

 is readily distinguished by the unarmed antenna?. The 



