476 Mr. M. Jacoby on 



elytra with a feeble transverse depression l)elow tlie base, violaceous, 

 tlie punctures not stronger than those of the thorax and arranged in 

 regular not very closely approached rows, distinct to the apex ; below 

 metallic greenish, legs pale flavous. 



Hal). Peru; Bolivia; Amazons; Colombia. 



I must separate this species, of which both sexes are 

 before me, from C. ccclcstina, Erichs., on account of the 

 different colour of tlie antennas, and from C. lacordairei, 

 Lef, on account of the fine punctuation of the thorax 

 and elytra, which is the same in all the specimens before 

 me. The Colombian specimen has a blackish violaceous 

 thorax and elytra, but does not differ otherwise. G. 

 sul2)liuri2x.s, Lef., has black antennae with the basal three 

 joints brownish only, the colour of the underside differs, 

 and the abdomen is clothed with fulvous hairs. The 

 difference in size between the two sexes is very great and 

 the thorax of the female is much more transverse and with 

 a fovea at each side. 



Colasjns amaznna', sp. n. 



Below bright metallic green, above greenish cupreous, the basal 

 joints of the antennas, the base of the femora and the tibioe and tarsi, 

 fulvous, thorax angulate at the middle, confluently and strongly- 

 punctured, elytra deeply and closely punctiired, the interstices trans- 

 versely rugose and strongly longitudinally costate at the apex. 



Length 5 millim.. 



Mas. Head metallic green, the vertex cupreous and strongly 

 punctured, with a deep central longitudinal grove, clypeus with a 

 deep fovea at thel)ase, impunctate, lalirum fulvous, antennte extend- 

 ing below the middle of the elytra, fuscous, the lower five joints 

 fulvous; thorax about one-half broader than long, the sides angulate 

 at the middle, the angles produced, the surface deeply and confluently 

 punctured, the interstices raised and smooth ; the punctures extending 

 to the lateral margins, scutellum smooth, elytra wider at tlie base 

 than the thorax, nearly similarly punctured, the punctures arranged 

 in irregular double rows near the suture and at the sides where they 

 are also larger, the interstices at the latter place, strongly transversely 

 rugose, those at the posterior half of the elytra strongly longitudinally 

 costate ; legs slender, the basa of the femora fulvous, the posterior 

 portion metallic green, the tibia) fulvous as well as the tarsi, the first 

 joint of the latter very elongate ; the flanks of the thorax as well as 

 the rest of the underside impunctate, metallic green. 



