CEDEMERID^E OF BOREAL AMERICA. 405 



the elytral costae are better marked than in any other of 

 our genera while in Copidita they are extremely feeble. 

 The following species are known to me: — 



Elytra black, sometimes faintly blue. 2. 



Elytra in great part yellow. discolor. 



2. — Body above totally black. nigra. 



Body not totally black. 3. 



3. — Head in great part yellow. erythrocephala. 



Head totally black. 4. 



4. — Thorax reddish yellow with central blaek spot; the disc concave. 



puncticollis. 



Thorax entirely reddish yellow. 5. 



5. — Thorax opaque, alutaceous; elytral costa? rather strongly marked. 



ruficollis. 



Thorax shining, punctate; elytral costse rather feeble. excavata. 



Asclera discolor Lee. Trans. Am. Ent. Soc, 1874. 

 p. 70. 



Form slender, beneath piceous, above yellow (except 

 head) the elytra tipped with piceous which gradually 

 shades into the yellow. Antennae black. Head black, 

 clypeus and labrum yellow, the surface moderately closely 

 punctate. Thorax scarcely longer than wide, sides 

 strongly arcuate in front, almost subangulate, narrowed 

 posteriorly, disc transversely concave, rather coarsely 

 and closely punctate, color reddish yellow, often with a 

 central piceous spot. Elytra coarsely and closely punc- 

 tate, finely pubescent, the costae very feeble. Abdomen 

 moderately closely punctate. Legs piceous, the femora 

 at apex and tibiae in upper half yellow. Length .22-26 

 inch.; 5.5-6.5 mm. 



The last ventral (apparently in both sexes) is oblique 

 each side, the middle slightly produced. The last dorsal 

 of the male is produced and compressed at apex. 



Occurs in northern California, Washington, and Ne- 

 vada. 



