298 Mr. H. W. Bates on Ccnimhi/ddie 



transversim elevato et tri-tuberculato ; elytris basi in- 

 EequalibuSj apice unispinosis, puuctis setiteris lineatim 

 seriatis, macula magna oblonga ante medium, paulo 

 obliqua, ochrea, fusco indeterminate marginata. 



Long. G^ lin. cJ . 



Hab. — River Tapajos, 



The legs are elongate, the hind femora (in the c?) 

 reaching a little beyond the apex of the elytra ; they are 

 distinctly clavate, i. e., the base is slender, and towards 

 the middle they become rapidly enlarged, so as to form 

 an elongate club. 



2, Ibid ion cedicncme, n. sp. 



Elongatum, supra nigro-piceum ; thorace multi-tuber- 

 culato, opaco, argenteo-sericeo ; elytris unispinosis, nitidis, 

 punctis setiforis sparsis, macula rotundata utrinque versus 

 basin, fascia obliqua pone medium alteraque recta apicali 

 testaceo-albis ; corpore subtus pedibusque rufo-piceis ; 

 antennis rufoscentibus, basi nigris ; femoribus elongatis, 

 abrupte tumide clavatis. 



Long. 6 lin. cJ. 



The thorax is very unequal on its sides and surface, 

 partly caused by the transverse elevation across the 

 anterior part having seven irregular tubercles ; anterior 

 and posterior to this, the thorax is constricted, and there 

 are other tubercular elevations behind ; the whole surface 

 is opaque, and clothed with silky tomentum. The white 

 markings of the elytra are rather broad, and there is a 

 wide space between the anterior rounded spot and the 

 posterior fascia. The thighs are abruptly clavate, and 

 the club tumid or dilated in the middle. 



Hab. — St. Paulo, Upper Amazons. 



3. Ibidion rnJiclhini, n. sp. 



I. oedicncnii valde affine, differt semper colore pallide 

 fulvo-rufo, femoribus minus in fiato- clavatis, elytris ma- 

 culis flavis anticis majoribus autice versus basin extensis. 

 Elongatum, fulvo-rufum ; thorace opaco, argenteo-sericeo 

 tomentoso, medio transversim elevato et multi-tubcr- 

 culato; elytris macula ovata prope basin antice angus- 



