812 MR M. JACOBY ON NEW COLEOPTERA. [Dec. 5, 



Hab. Amazons. 



The peculiar olive-green colour, as well as the small size and the 

 position of the tubercles on the thorax, will distinguish this species 

 at first sight from others. 



10. Chlamys pallida, sp. nov. 



Ovate, narrowed in the middle, above pale testaceous mixed with 

 brown. Head testaceous, with the upper portion of a darker brown 

 closely and rather deeply punctate ; flat, without any depressions ; 

 apex of jaws black, labrum brown shining ; antennae entirely fer- 

 ruginous brown. Thorax mounted at its posterior half by a rather 

 high elevation of a triangular shape very nearly of the same form as 

 in C. bartletti, but divided by a wider channel, the edges of 

 which are strongly sinuate-rugose ; a patch on each side below the 

 elevation, as well as seven small spots arranged in a half-circle in the 

 middle of the thorax, dark brown ; tbe whole surface deeply pitted 

 with brownish punctures , nearly the entire posterior margin dentate, 

 of a black colour ; scutellum pale testaceous, with acute posterior 

 angles, impunctate. Elytra deeply punctate, confused-reticulate at 

 their posterior half, tbe punctures from the base to the middle of 

 a deep brown, from there of a lighter colour; a distinct costa or 

 ridge runs from the base in a curved line towards the apex, not quite 

 reacbing the latter, sending off a short branch from the third part 

 of its length towards the base between the shoulder and the first 

 ridge ; another short elevation exists close to and a little beneath tbe 

 scutellum ; the entire apical region punctate-reticulate, and the 

 sutural margin dentate nearly through its entire length. Body be- 

 neath of the same colour as the elytra ; a rounded spot of a ferru- 

 ginous colour is situated on the abdomen close to the margin of the 

 elytra, while the legs in their middle also bear a patch of the same 

 colour, which occupies the tarsi and claws entirely ; the whole under- 

 surface deeply punctured. 



Length 3 lines. 



Hab. Amazons. 



In my collection. 



11. Chlamys excavata, sp. nov. 



Oblong, subcylindrical, narrowed behind, above entirely ferrugi- 

 nous, below testaceous ; head deeply punctate, the punctures of a 

 more or less dark brown colour, labrum fulvous shining, jaws 

 black ; basal joints of the antenna; ferruginous, the rest fuscous ; 

 thorax raised gradually to a hump-like elevation of a rounded shape, 

 the top of which is divided by a shallow depression, the entire sur- 

 face closely rugose-punctate, the punctures a little less crowded near 

 the sides ; scutellum bisinuate, smooth. Elytra with an excavated 

 space of a dark fuscous colour reaching from the base near the 

 scutellum to nearly the middle of their disk, the commencement 

 and the end of which is marked by a short pointed tubercle ; exactly 

 in the middle of each elytron is another fovea of an oblique direction 

 towards the shoulders ; the entire surface confusely punctate-rugose, 



