South American Uumoljndw. 455 



acutely raised ridge each side of the clypeus, the hitter triangular, 

 strongly punctured, antennte extending to the base of tlie elytra, 

 black, the lower six joints fulvous, terminal joints strongly thickened ; 

 thorax twice as broad as long, the sides obsoletely angulate below 

 the middle, obliquely narrowed towards the apex, the disc very 

 convex, very remotely punctured at the niiddle, more closely and 

 very strongly so at the sides ; elytra with an obsolete depression 

 below the base, very strongly and deeply punctured in rows which 

 have some additional punctures within the depression, the interstices 

 at the sides and apex costate ; the under side and the legs black, the 

 tarsi more or less piceous. 



Rah. Amazons. 



The black colour of this species, structure of the head, 

 the very deep punctuation of the thorax and elytra and 

 the costate interstices of the latter distinguish it from 

 any of its allies; I am not certain as to the sex of the 

 specimen. 



Chrysodina thoracica, sp. n. 



Below blackish, above bright cupreous, the basal joints of the 

 antennce and the tarsi fulvous, head and thorax remotely pixnctured, 

 elytra strongly punctate-striate anteriorly, finely so near the apex. 



Length 2i niillim. 



Head very remotely punctured, slightly strigose above the eyes, 

 the clypeus with some deep punctures, antenna) with the lower five 

 joints fulvous, the rest black, strongly thickened, the basal joint 

 stained with piceous above ; tliorax twice as broad as long, the sides 

 feebly rounded, the surface very remotely and finely punctured, the 

 basal margin accompanied by a row of closer punctures at the sides ; 

 elytra with a very shallow depression below the base, very finely 

 and remotely punctate-striate, the base at the sides more strongly 

 punctured, the punctures extending upwards to the Ijasal margin in 

 front of the shoulders ; under-side and legs nearly black, the tarsi 

 fulvous. 



Hal. Cayenne. 



This small species may be distinguished from C. servula, 

 Lef. and 0. semiaurata, Lef. by the colour of the under- 

 side and legs and by the very remote punctuation of the 

 thorax and the elytra. I have received from M. Ciavareau 

 two specimens which \ refer to the male sex. 



