52 CONTRIBUTIONS TO CANADIAN PALAEONTOLOGY. 



a little larger than it. The sutural stria is exactly as in that species, and 

 the striic are finely impressed and without punctures ; the interspaces 

 would appear to be flatter than in P. 'patruelis, and the third interspace 

 does not appear to have the three punctures found in that species, but 

 only the central one. The colour is blackish castaneous. 



Length of one fragment, 3*5""" ; probable length of elytron, 4-75"'™; 

 width of same, 1-5""". Length of another fragment, 3-8""" ; width, 

 1-45™'". 



Pterostichus jjcitr^ielis is found in the middle and western United States 

 and also in Canada and about Lake Superior. 



Interglacial clays of Scarboro', Ontario. Two specimens, Nos. 14519, 

 14549_G. J. Hinde. 



Pterostichus gelidus. 



Loxandriis gelidus Scudd., Bull. U.S. Geol. Geog. Surv. Terr., in, 763-764 (1877). 

 Pterostichus yelidus Scudd., Tert. Ins. N.A., 527-528, PI. i, figs. 52, 59-61 (1890). 



The following fragments of this species have been examined : A very 

 nearly perfect elytron, but badly cracked and pressed apart ; the grea;ter 

 part of another ; parts of three united segments of the abdomen : a 

 prothorax slightly cracked and a portion of one of the mandibles. A 

 species is indicated of about the same size as P. huclsonicus LeC, and 

 closely resembling it. The elytra are piceous, with a metallic-blue reflec- 

 tion ; there are nine distinctly and rather deeply and equally impressed 

 striae, rather faintly and not very profusely punctate ; the interspaces 

 appear as if minutely cracked, and with a simulation of execessively faint 

 and small fovepe throughout, while the third has a more distinct, though 

 still rather shallow and rather large fovea considerably behind the middle 

 of the apical half of the elytra ; a second fovea appears in the third inter- 

 space, as far from the apical fovea as that is from the apex, but it is 

 situated laterally, encroaching on the stria next its inner side. It is per- 

 haps due only to an excess of the simulating fove:e that there is apparently 

 a row of approximated punctures, quite like those of the neighbouring 

 striae, for a very short distance between the base of the sixth and seventh 

 striae. The first stria turns outward next the base, to make room for a 

 scutellar stria. The obliquely cut marginal fovetii agree with those of P. 

 hudsonicus. The prothorax is quadrate, the front margin veiy slightly 

 angled, the sides broadly I'ounded, fullest anteriorly, with an exceedingly 

 slight median sulcus (indicated by a slender crack), and more distinct 

 posterior sublateral sulci (indicated by wider cracks), and between which 

 the hind border is scarcely convex. The surface of the prothorax is 

 smooth ; the abdomen is also smooth. The part of the mandible remain- 



