402 CALIFORNIA ACADEMY OF SCIENCES. 



Copidita mimetica n. sp 



Form slender, piceous black. Thorax reddish yellow, 

 paler at apex and base. Elytra with the suture and en- 

 tire margin pale. Antennae black. Head black, mod- 

 erately coarsely punctate. Thorax longer than wide, 

 sides arcuate in front, sinuately narrowing posteriorly, 

 disc somewhat irregular, surface somewhat coarsely and 

 closely punctate and alutaceous, color reddish yellow, 

 decidedly paler at apex and base. Elytra piceous black, 

 opaque, moderately coarsely, densely punctate, finely sub- 

 costulate, slightly pubescent. Body beneath and legs 

 piceous, finely punctate. Length .36 inch.; 9 mm. 



The majority of specimens examined have piceous legs, 

 but many occur with pale legs, the knees and tarsi above 

 darker. 



This species bears so close a resemblance to Oxacis 

 cana that the specimens have been associated with that 

 species in every collection examined. 



Specimens are known to me from Kansas and Texas. 



Copidita obscura Lee. (Asclera) Proc. Phil. Acad., 

 1854, P- 2I - 



Form slightly more robust, piceous, opaque; thorax 

 reddish. Antennae black, not close to the eye at base. 

 Head moderately closely punctate, sparsely pubescent. 

 Thorax wider than long, sides arcuate in front, slightly 

 narrowed posteriorly, disc somewhat irregular, closely 

 punctate, sparsely pubescent. Elytra piceous, opaque, 

 densely punctate, sparsely pubescent, finely subcostulate. 

 Body beneath piceous, with a slight violaceous surface, 

 punctulate. Legs piceous. Length .36-. 44 inch. ; 9-11 

 m m . 



In the male the last ventral is yellow, the apex obtuse 

 or feebly emarginate. In the female the segment is longer, 



