298 
Mr. H. W. Bates on CeramhycidcG 
transversim elevate et tri-tuberculato ; elytris basi in- 
sequalibus^ apice unispinosis, punctis setiferis lineatim 
seriatis^ macula magna oblonga ante medium, paulo 
obliqua, ocbrea, fusco indeterminate marginata. 
Long. lin. S . 
Hab. — River Tapajos. 
The legs are elongate, the hind femora (in the S') 
reaching a little beyond the apex of the elytra ; they are 
distinctly clavate, L e., the base is slender, and towards 
the middle they become rapidly enlarged, so as to form 
an elongate club. 
2. Ihidion oedicnemej n. sp. 
Elongatum, supra nigro-piceum ; thorace multi-tuber- 
culato, opaco, argenteo-sericeo ; elytris unispinosis, nitidis, 
punctis setiferis sparsis, macula rotundata utrinque versus 
basin, fascia obliqua pone medium alteraque recta apicali 
testaceo-albis ; corpore subtus pedibusque rufo-piceis ; 
antennis rufescentibus, basi nigris ; femoribus elongatis, 
abrupte tumide clavatis. 
Long. 6 lin. . 
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 rubellwni, n. sp. 
I. oedicnemi valde affine, differt semper colore pallide 
fulvo-rufo, femoribus minus inflat o- clavatis, elytris ma- 
culis flavis anticis majoribus antice versus basin extensis. 
Elongatum, fulvo-rufum ; thorace opaco, argenteo-sericeo 
tomentoso, medio transversim elevate et multi-tuber- 
culato; elytris macula ovata prope basin antice angus- 
