OCTOGONOTES. 1 65 



Oblong-oval, robust, subparallel, black, shining. Head short, not 

 produced, with a T-like impression between the eyes ; glabrous, 

 sparingly punctured. Thorax transverse, subdepressed ; the sides 

 are marginate, produced laterally on either side (a little before the 

 middle) into a very obtuse angle (apparently formed by the trunca- 

 tion of the anterior angles) ; the surface smooth and sparingly 

 pimctate ; the colour is fulvous, clothed (especially at the base and 

 sides) with a fine golden pubescence. Scutellum large, flavous. 

 Elytra black, shining, with ten striae-like rows of almost obsolete 

 punctures ; two fasciae (the one a little before the middle, and the 

 other at an equal distance between this and the apex), both of which 

 are interrupted by the suture, are formed by bright golden pubes- 

 cence on a fulvous ground ; four spots likewise are similarly formed 

 by this golden pubescence on the surface of the elytra : two, at (but 

 not touching) the humeral angles ; a third, oblong in form, at the 

 basal part of the suture ; and a fourth, as large as the other three 

 xmited, subtriangular at the apex ; these two latter are common to 

 both elytra. Antennw robust, filiform, fulvous. Legs fulvous ; the 

 upper surface of the anterior tibiae and femora being obscurely 

 clouded with black. 



Ega, in the district of the River Amazon. 



6. Octogonotes bicinctus. 



0. oblongo-ovatus, subcylindricus, niger, nitidus ; capite brevi, de- 

 presso, supra antennarum basin oblique foveolato, imptinctato ; 

 thorace transverso, angulis anticis depressis, oblique truncatis, ad 

 basin oblique depresso, impunctato, subpubescenti, jiavo ; elytris 

 latis, striato-punctatis, vittis cluabus (pilo albo formatis trans- 

 versis), ad angidos humerales macula circulari, et juxta scutellum 

 prope suturam linea brevi notatis ; antennis filiformibus, ferru- 

 gineis, apice testaceis ; pedibus fulvis, superne fuscis. 



Long. corp. 3-L lin., lat. lg lin. 



Oblong-ovate, robust, subdepressed, black, shining. Head short, 

 depressed, almost vertical ; maxillary palpi rufous ; eyes prominent, 

 situated at the back of the head, extending laterally nearly as far as 

 the anterior angles of the thorax ; below the base of the antennas is 

 a transverse, triangular, black glabrous depression ; above the base of 

 the antennas (and between the eyes) is a narrow, obliquely transverse 

 fovea; the surface is almost impunctate, black. Thorax rather 

 broader than the head, transverse ; the anterior angles depressed 

 and subacute, broadly and obliquely truncate, forming medially in 

 the margination a short angular projection ; at the base a broad 



