286 Mr. J. S. Baly's desc7-iptions of neio genera 



rather more quickly converging near the latter, all the 

 angles acute ; disk minutely granulose, finely but distinctly 

 punctured. Elytra scarcely broader than the thorax, very 

 convex, more strongly punctured than the thorax, the 

 punctures arranged in nearly regular strias on the inner 

 disk, less regularly placed towards the outer margin; inter- 

 spaces plane, finely granulose ; inflexed limb concave. 



Chalcoplacis alternata. 



Rotundata, valde convexa, subgibbosa, nitlda, subtus 

 nigra, abdomine obscure rufo ; supra cvanea, antennis 

 brevioribus fulvis, articulis 7°^°, 9'^^ 10'"° "et ir"° nigris; 

 thorace minutissime, subremote punctate, lateribus viridi 

 tinctis ; elytris minute subseriatim punctatis. 



Long. 2§ lin. 



Hab. — Amazons, Cayenne. 



Head deeply buried in the thorax, ])lane, subopaque, 

 very finely punctured, tinged with metallic green ; clypeus 

 wedge-shaped, the sutural lines separating it from the 

 face very fine, sometimes entirely olisolete ; labrum and 

 mouth black; antennas scarcely half the length of the 

 body, the five outer joints veiy slightly thickened ; fulvous, 

 the 7th, 9th, 10th and 11th joints black. Thorax nearly 

 three times as broad as long ; sides rounded and con- 

 verging from base to apex, more quickly converging 

 before the middle, the anterior angles obtuse, the hinder 

 ones acute ; disk very finely and rather remotely punctured, 

 the extreme lateral margin narrowly edged with metallic 

 green. Elytra slightly broader than the thorax, very 

 convex, subgibbose, rather more distinctly punctured than 

 the thorax, the punctures arranged in irregular longitudinal 

 striae ; inflexed limb concave. 



Ch a Icoj) lacis nit idle o Ills . 



Subrotundata, valde convexa, nitida, nigro-fenea, coeruleo 

 tincta, tarsis fulvis; supra l^te viridi-a?nea, labro anten- 

 nisque rufo-fulvis, his extrorsum nigris ; thorace disco 

 minute et sparse punctato, lateribus magis crebre et 

 magis fortiter punctatis ; elytris sat fortiter, subseriatim 

 punctatis. 



Long. 2 3 lin. 



Hah. — Cayenne. 



Head rather strongly but not very closely punctured. 



