474 Mr, M. Jacoby on 



Length 5 millim. 



Mas. Head strongly punctured near the eyes and at the middle, 

 the clypeus more closely pu«ctate, labrum piceous, antennaj black, 

 the lower five joints fulvous, terminal joints rather thickened ; thorax 

 twice as broad as long, distinctly angulate at the middle of the sides, 

 the anterior angles tuberculate, the surface evenly, closely and 

 strongly punctured, the punctures evenly distributed ; elytra with a 

 feeble depression below the base, scarcely more strongly punctured 

 than the thorax, the punctures arranged in closely placed double 

 rows, which near the apex become single, the interstices smooth, 

 not convex ; below of a more greenish tint, the legs fulvous. 



Hah. Rio Janeiro. 



Amongst the violaceous or blue species, this is the only 

 one which has the elytral punctuation arranged in double 

 rows in connection with the closely and evenly punctured 

 thorax. 



ColasjHs rufipes, sp. n. 



Metallic violaceous blue, the basal joints of the antennte and the 

 legs reddish-fulvous, thorax angulate at the middle, very closely 

 punctured, elytra punctured like the thorax in very closely arranged 

 rows, the interspaces not convex, excej^t at the apex. 



Length 7 millim. 



Mas. Head strongly and very closely punctured, transversely 

 depressed between the eyes, the clypeus punctured like the head, 

 bounded above by smooth raised space-s at the sides, labriuu and 

 palpi fulvous, antennae fuscous, the lower five joints fulvous, third 

 and fourth joints equal, the following joints more elongate ; thorax 

 nearly twice as broad as long, rather long, the sides distinctly 

 angulate at the middle, the surface deeply but not very closely 

 punctured at the disc, very closely so at the sides, where the punctures 

 extend close to the lateral margins, scutellum impunctate, transvei"se ; 

 elytra not more strongly punctured than the thorax, the punctures 

 arranged in closely approached rows near the suture, more crowded 

 and irregularly at the sides and still more so at the apex, which has 

 a short raised tubercle placed near the lateral margins; below 

 violaceous, the flanks of the thorax strongly punctured, the rest 

 impunctate, legs rufous. 



Rah. Bolivia. 



Much more strongly and closely punctured than 0. 

 lacordairei, C. imirrcssa, Lef., and C. sul2Jhuripcs, Lef., 

 larger than the last-named species, the elytra without 

 basal depression, the legs reddish fulvous. 



