274 SEEKICOBNIA. 



b 6 . Elytra without a line of lighter scales on each of the striae . lafargei. 

 b 5 . Marginal bands on the prothorax not extending to the base, 

 narrowed behind. 

 c\ Elytra with a line of elongate white scales on each of the 

 strise, the white scales sometimes covering the whole of 

 the surface, the interstices without minute darker scales . rugatus. 

 d\ Elytra without a line of lighter scales on each of the striae, 

 the disc uniformly clothed with minute greenish or 



olivaceous scales escnscnoltzi. 



b\ Scales on the epipleurse similar to those on the elytral margins. 

 c 5 . Elytra punctate- striate, with at least the alternate interstices 

 raised. 

 e\ Hind angles of the prothorax extending beyond the humeri; 



elytral interstices subequal limbatus. 



/ 6 . Hind angles of the prothorax not extending beyond the 

 humeri; alternate elytral interstices broader and more 



raised appro ximatus. 



d 5 . Elytra very lightly striate-punctate, the interstices quite flat . webbi. 

 b'". Prothorax and elytra without a marginal band of lighter scales. 

 c 4 . Elytra with interstices equal, slightly raised ; deeply punctate- 

 striate. 

 e 3 . Form elliptic, very broad ; disc of the prothorax coarsely longi- 

 tudinally wrinkled ; scales variable in colour — usually blue, lacordairei. 

 f'\ Form oval, broad; disc of the prothorax smoother; scales 



variable in colour — usually golden-green or violaceous . . exquisitus. 



g 5 . Form oblong-oval ; scales greenish virens. 



d*. Alternate elytral interstices more or less raised. 



h s . Stria? rather deeply impressed, the punctures subapproximate. 

 g e . Scales olive-brown. 



a 7 . Alternate interstices moderately costate silbermanni. 



b 7 . Alternate interstices strongly costate morio. 



A 8 . Scales slaty-blue pruinosus. 



i 5 . Strise almost obsolete, the punctures very fine and widely 

 separated ; scales olivaceous -green, purplish in certain 



lights forreri. 



b". Antennas with the third joint small, shorter than the fourth, in some 

 species not much longer than the second. 

 d n . Prothorax and elytra with a marginal band of fulvous, luteous, or 

 whitish scales. 

 e 4 . Marginal bands on the prothorax contiguous to the outer edge 

 and extending to the base, widened behind ; the scales on the 

 under surface, like those on the margins, elongate, white . . virginalis. 

 / 4 . Marginal bands on the prothorax extending obliquely from 

 opposite the eyes to near the base, narrowed behind; the 

 scales on the under surface minute, olivaceous or greenish . angustatus. 



