446 CALIFORNIA ACADEMY OF SCIENCES. 



scales, Scutellum longer than wide. Elytra much wider 

 at base than the base of the thorax, a little wider behind 

 the middle, humeri moderately prominent, disc convex, 

 wnth fine stria?, stria" not densely punctured, intervals flat, 

 with a row of extremely short seta?. Body beneath scaly 

 as above. Legs pale brown, with scales and hairs. 

 Femora not dentate, tibiii? not sulcate. Length, .08-. 12 

 inch; 2—3 mm. 



The specimens examined vary in the distinctness of 

 the sinuous el^^tral band, in one specimen scarcely dis- 

 cernible. 



This species is a true Polydrosus, and from the struc- 

 ture of the antenna and their scrobes is related to the 

 European tcreiicoUis. 



With Polydrosus the genus Cyphomimus is synony- 

 mous, as indicated by Bedel (Coleop. du Bassin de la 

 Seine, vi, p. 57, note). The species described by me as 

 C . dorsalis is probably the same as Polydrosus aincricaiiiis 

 Gyll. 



Coral de Piedra, El Taste, San Jose del Cabo. 



COPTURUS QUADRIDENS n. sp. 



Form moderately robust, densely clothed with white 

 scales ornamented with brown. Front narrow, with in- 

 termixed white and brown scales extending on the beak. 

 Thorax as wide as long, constricted at apex, the angles 

 prominent, limiting the constriction behind is an arcuate 

 row of six tubercles, a tubercle at the middle of the apical 

 margin, two tubercles on the disc behind the two middle 

 tubercles of the arcuate series, sides of thorax irregular, 

 median line carinate, surface with white scales with a 

 transverse brownish space at base and the tips of the dis- 

 cal tubercles. Elytra each prolonged in a truncate 

 tubercle, a post-basal transverse ridge, on each elytron at 



