scuDOER.J CANADIAN FOSSIL INSECTS. 53 



ing is only the basal " molar " portion, armed with six or seven mammi- 

 late conical teeth, or rather transverse ridges. 



Length of elytron, 5 -TS™" ; breadth, 2'"™ ; length of prothorax, 2-25™".; 

 breadth, 3 •5'""'; breadth of abdomen, 2-25™"'. 



The species differs from P. liudsonicus in the shape of the prothorax (if 

 that belongs here), broader strife, and less convex elytra. 



Pterostichus hudsonicus is a northern species found in Alaska, the 

 Hudson Bay territories, Lake Superior and New Hampshire. 



Interglacial clays of Scarboro' Heights, near Toronto, Canada. Several 

 specimens, among others Nos. 14521, 16418 — G. J. Hinde. 



Patrobus Megerle. 



Patrobus g-elatus. 



Patrobu.^ (jelatus Scudd., Tert. Ins. N. A., 530, PI. i, fig. 48 (1890). 



Of this species the only remains are a single prothoracic shield perfectly 

 preserved. It is piceous, posteriorly truncate, its angles rectangular and 

 as broad as the length, in advance of the hinder fourth expanding to 

 nearly one-fourth greater width in the middle of the anterior half, and 

 then again narrowing to the declivous front angles; the disk convex, with 

 a uniformly and rather deeply incised median line, each lateral half thus 

 divided marked posteriorly by an abrupt flat and punctate depression, 

 with well marked rounded outline, distinctly separated from the median 

 incision on one side or the very narrow, marginate, lateral border on the 

 other, and separated from the latter also by a longitudinal furrow ; 

 otherwise the surface is smooth. It is undoubtedly related very closely to 

 P. septentrionis Dej.,diifering principally in the sharp and sudden depres- 

 sion of the fossae in the hind angles and their separation from the lateral 

 border by a distinct incised longitudinal furrow. 



Length of prothorax, 2-1'"™ ; greatest breadth, 2"75""". 



Patrobus sejMntrionis is found in Arctic America and Europe, includ- 

 ing the mountains of Central Europe, and also in Michigan and New 

 Hampshire. 



Interglacial clays of Scarboro', Ontario. One specimen, No. 14586 — 

 G. J. Hinde. 



Bembidium Latreille. 



Bembidinm glaciatiim, 



Bemhidium ijlariat.um Scudd., Tert. Ins. N. A., 531, PI. i, fig. 40 (1890). 



A couple of elytra represent this species, which seems to be nearly 

 allied to the scarcely smaller B. longulum LeC. The humeral angle is 



