816 MR. M. JABOBY ON NEW COLKOPTERA. [Dec. 5, 



now and then and in certain lights assumes on the head and thorax 

 a lighter brown, this species is sufficiently distinguished from others. 



Family Chrysomelid^e. 



Genus Doryphora, Illig. 



20. Doryphora rugosa, sp. nov. 



Oblong-ovate, rounded and widened in the middle, very convex 

 towards the first third of the elytra, then falling off abruptly towards 

 the apex. Above blackish blue, variegated with testaceous, below 

 black, shining. Head deeply and closely covered with punctures 

 which run together towards the epistome, with a longitudinal middle 

 groove through its entire length. Antennae rather longer than the 

 thorax, robust, black, shining, with the third joint the longest and 

 thinnest. Thorax with the lateral margin slightly rounded and the poste- 

 rior one sinuate, punctured in the same way as the head, on its surface 

 more strongly towards the sides, these latter excavated and flattened 

 and accompanied by a fulvous narrow band, which is much hollowed 

 out at its inner margin. Scutellum im punctate. Elytra broader 

 than the thorax, everywhere covered with rugosities and deep impres- 

 sions distinctly visible to the naked eye ; a narrow dentated band of 

 testaceous colour extends across the middle from one side to the 

 other, sending upwards three or four branches of the same colour 

 towards the base ; while the posterior half of the elytra is variegated 

 in the same way, more strongly visible near the suture. The meso- 

 sternal process comparatively short and straight. 



Length 8 lines. 



Hab. Columbia. 



In the collection of Dr. Baden, in Altona, and my own. 



21. Doryphora cost at a, sp. nov. 



Ovate, very slightly widened behind, very convex towards the first 

 half, then suddenly falling off towards the apex, above dark brown, 

 a little shining, beneath black. Head and thorax without gloss ; 

 the first with a rather deep longitudinal impression before the 

 anterior margin of the eyes, a transverse groove between the antennae, 

 and a few scattered punctures here and there; labrum brown, shining ; 

 antennae not reaching quite to the base of the thorax, light flavous, 

 the first joint much thickened, almost cylindrical, the second very 

 short, the third the longest, double the length of the fourth, the 

 rest thickened, cylindrical. Thorax with the sides straight and 

 parallel, the anterior corners rounded and produced into a point 

 reaching slightly above the eyes ; posterior margin slightly sinuate, 

 anterior straight in middle, with a distinct margin which extends 

 also to the sides, where it is, however, very narrow. The surface im- 

 pressed with a few strong punctures, which are a little more numerous 

 towards the sides. Elytra wider at the base than the thorax, assu- 

 ming their greatest convexity exactly at the middle, from there 

 suddenly declining to the apex ; each elytron with ten rows of 

 elevated ridges, of which the first and second are united at a little 



