412 CALIFORNIA ACADEMY OF SCIENCES. 



7. — Elytra pale; legs pale. 



Terminal joint of maxillary palpus one-half longer than the 



preceding; antennae piceous. pallida. 



Terminal joint not longer than preceding; antennas pale, sororia. 



Elytra nearly black, thorax red, legs black. floridana. 



Elytra and thorax piceous, pubescence gray and coarse. grisea. 



8. — Antennas black. cana. 



Antennas pale to piceous, never black. tamiata. 



9. — Elytra piceous. 10. 



Elytra testaceous. 11. 



10. — Head and thorax entirely yellow, not strongly punctate. bicolor. 



Head and thorax partly piceous, coarsely and rather closely 



punctate. dubiosa. 



11. — Pubescence dense, entirely concealing the sculpture, claws 



slender. sericea. 



Pubescence not dense, sculpture visible; claws stouter at base. 



subfusca. 

 12. — Elytra closely punctulate over the entire surface. lucana. 



Elytra rather sparsely punctate, very feebly so at apex; form 



slender. debllis. 



Oxacis laevicollis n. sp. 



Slender, piceous, head and thorax pale, elytra nearly 

 black with suture narrowly paler. Head pale, with piceous 

 spot between the eyes, surface sparsely punctate. An- 

 tennas brownish. Thorax longer than wide, sides feebly 

 arcuate in front and but little narrowed posteriorly, disc 

 somewhat irregular, surface quite smooth, with very few 

 punctures, not pubescent, color yellowish with a piceous 

 spot each side in front. Elytra nearly black with the 

 suture narrowly pale, surface moderately closely punc- 

 tate and vaguely subcostulate. Body beneath piceous, 

 finely punctate. Femora pale, tibice and tarsi piceous. 

 Length .22— .34 inch.; 5.5—8.5 mm. 



The last joint of the maxillary palpus in this species 

 is feebly subcultriform, in fact approaching the triangular 

 form. It may, however, be known by the quite smooth 

 thorax, scarcely punctate. 



A specimen in my cabinet is entirely piceo-testaceous, 



