1870.] MR. M. JACOBY ON NEW COLEOPTERA. 811 



not closely punctured ; labrum, palpi, underside of first joint, as well 

 as the second and third entire joints, of antennae ferruginous. Thorax 

 with the lateral margin rounded, the posterior deeply sinuate, 

 rugose-punctate, with a high triangular elevation on the middle of 

 its disk, the top of which is divided by a shallow longitudinal 

 channel, the posterior sides at the same time falling off suddenly 

 towards the base of the thorax, and occupied by another small 

 rounded elevation not reaching the lateral margin. Scutellum 

 acute triangular, impunctate. Elytra with the sutural margin dentate 

 almost through its entire length, the surface of each elytron contain- 

 ing three strongly raised curved ridges running nearly in a line with 

 each other, and connected together by short transverse branches 

 and here and there by a network of elevated striae ; besides these 

 three large ridges another short one of an S-shape is situated near 

 the suture at the base, and joined to the first ridge in its middle. 

 Body beneath, together with the legs, greenish blue, closely rugose- 

 punctate ; last joint of the tarsi ferruginous. 



Length 3 lines. 



Hab. Peru. 



This beautiful species, which was discovered by Mr. E. Bartlett 

 during his travels in Peru, is easily separated from others by its bril- 

 liant metallic blue, its size, and the markings of its elytra (which ap- 

 proach to a certain extent those of C. episcopalis, Lac), but vet is very 

 different in its general character. The species is in my collection. 



9. Chlamys tjnicolor, sp. nov. 



Ovate-oblong, convex, subcylindrical, narrowed behind, upper and 

 underside unicolorous bluish olive-green, not shining. Head with a 

 longitudinal impression ; anterior margin of epistome rounded, the 

 entire face strongly punctate ; labrum shining fulvous ; antennae 

 either entirely or only the basnl joints light brown. Sides of thorax 

 almost straight, converging from base to apex, angles moderately 

 acute ; posterior margin not bisinuate but largely waved, median 

 lobe moderately produced, its apex bidentate, as usually in this 

 genus ; upper surface closelv punctate ; a humplike elevation of 

 moderate size is situated on the disk, divided by a shallow channel 

 and surrounded on all sides by another narrow depression ; each 

 side of the hump is furnished with 6 tubercles, of which 5 are 

 situated in a semicircle, while the sixth is contained in its middle ; 

 scutellum transversely subquadrate, its sides sinuate, narrower at 

 the base than at the apex, hollowed out in its middle, impunctate. 

 Elytra distinctly narrowed from their base towards the apex, sides 

 almost as far lobed as their middle ; upper surface coarsely but 

 widely punctate, forming only one regular stria at the sutural margin, 

 which latter is finely dentate from the middle to the apex ; trans- 

 verse irregular costae and a few tubercles are placed without order 

 on the disk of each elytron. Underside deeply impressed with 

 numerous round large punctures, which, however, extend to the 

 legs only sparingly. 



Length 2 lines. 



