COLEOPTERA OF BAJA CALIFORNIA 245 



densely tuberculate, a vague median impression posterior- 

 ly. Elytra vaguely striate, punctures of striae coarse but 

 not close, intervals flat, more closely and finely granulate 

 than the thorax. Length, .18 inch.; 4.5 mm. 



Mentum broader than long, deeply concave, the apex 

 emarginate. 



The unique before me is a female, and shows no arma- 

 ture of the legs. 



This species, by the form of mentum and simple 

 clypeus, is not especially related to any in our fauna. In 

 its color it is unique, and might be mistaken for an On- 

 thophagus. 



Pomona, Cal., from H. C. Fall. 



OCHOD^US FRONTALIS LcC. 



This occurs in Coahuila, Mex. It evidently escaped 

 Mr. Bates' observation, unless O — 4 (Lamellic. p. 107) 

 is it. 



Rhopalophora bicincta n. sp. 



Black, rather dull, elytra with a basal and a post-median 

 slightly arcuate narrow band of silvery white pubescence. 

 Head closely punctate, occiput between the eyes 

 smoother. Antennas (female) yellow, not longer than 

 the body, joints 5-10, gradually shorter, 11 slightly 

 longer than 10, joints 8-10 slightly serrate. Thorax as 

 in R. longifes, sparsely punctate, more closely on the 

 flanks, surface alutaceous, beneath more shining, slightly 

 transversely wrinkled and sparsely punctate. Elytra 

 parallel, scarcely wider than the thorax, apices obtuse 3 

 or 4 dentate, surface closely cribrate punctate. Body 

 beneath black, shining, sparsely punctate and with sparse 

 hairs, but with denser patches of silvery white pubescence 

 at the sides of mesosternum, the hind angles of meta- 

 sternum and at the sides of the first ventral segment along 



