18 TERTIARY COLEOPTERA OF NORTH AMERICA. 



the surface slightly roughened, the color testaceous. It differs from any 

 Nebria I have seen in that the sutural stria runs uninterruptedly to the base, 

 while a short, oblique, faint, supplementary stria runs between the first and 

 second striae, into the former near the base. 



Length of elytron, 7.25 mm.; breadth, 2.75 mm. 



Florissant, Colorado; one specimen, No. 16382. 



BEMBIDIUM Latreille. 



Of this dominant genus, dominant especially in the north temperate 

 zone, and of which more than one hundred and twenty species are known in 

 America, a number have been found fossil. Most of these, including five 

 existing species and ten in all, are confined to the Pleistocene of France, 

 Bavaria, Gralicia, Ohio, and Canada; the others, seven in number, come 

 from the middle and lower Tertiaries of Radoboj, Aix, Amber, and Colorado, 

 while the genus has been recognized also at Oeningen and in Alsatia. The 

 following species are included in the above enumeration : 



Bembidium exoletum. 



Be)nUdium exoletum Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., II, 77-78 (1876); 

 Tert. Ins. N. A., 530-531, pi. 5, figs. 121, 122 (1890). 



White River, Colorado. 



Bembidium glaciatum. 



Bembidium glaciatum Scudd., Tert. Ins. N. A., 531, pi. 1, fig. 40 (1890); Contr. 

 Canad. PaliBont., II, 53-54 (1892). 



Clay beds of Scarboro, Ontario. 



Bembidium fragmentum. 



Bembidium fragmentum Scudd., Tert. Ins. N. A., 531-532, pi. 1, fig. 45 (1890); Contr. 

 Canad. Palfeont.. II, 54 (1892). 



Clay beds near Cleveland, Ohio. 



Bembidium obductum sp. nov. 



PL I, fig. 9. 



Allied to B. simplex LeC. The head is of the usual form, with large 

 projecting eyes, and the antennae are long and slender, with long and 



