50 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



Pterostichus Bonelli. 



Table of the Interglacial species of Pterostichus. 



Sutural stria uniting with the first near the base. 



Cell inclosed by sutural and first strise not twice as long as 

 the width of interspace between first and second strise ; 



striae without punctures abrogatus. 



Cell inclosed by sutural and first strise fully three times as 

 long as width of interspace between first and second 

 strise. 

 Strife punctate. 



Strise heavily punctate. 



Fifth and sixth strife united in the apical sixth of the 



elytra dormitans. 



Fifth and sixth strise united near the middle of the distal 



half of the elytra (lestitutus. 



Stri» faintly punctate fractus. 



Strise impunctate destruetus. 



Sutural stria independent of the first gelidus. 



Pterostichus abrogatus. 



Pterostiehus abrogatus Scudd., Tert. Ins. N.A., 525, PI. i, fig. 39 (1890). 



A fragment of an elytron indicates a species closely allied to P. hercu- 

 laneus Mann, in elytral structure and of probably about the same size. 

 The sutural stria is similar ; there are the same broad and deep, simple 

 strise, only they are, if anything, broader and deeper in the fossil. The 

 interspaces are, however, flatter than in the recent species, and the inti- 

 mate texture of the surface, instead of showing a very distinct reticulation 

 of minute imbricated cells with sharply defined walls, is almost entirely 

 smooth, the faintest sign only of such tracery being visible with strong 

 magnification. The first stria is also at an unusual distance from the 

 margin. The colour is piceous. 



Length of fragment, 5™™ ; width of same, 2"™ ; presumed length of 

 elytron, 7-5"'™. 



Pterostichus herculaneus is found in Alaska and Vancouver Island. 



Interglacial clays of Scarboro', Ont. One specimen. No. 14560 — G. J. 

 Hinde. 



Pterostiehus dormitans. 



Pterostichits dormitans Scudd., Tert. Ins. N.A., 526, PI. i., figs. 49, 55 (1890.) 



This species is mentioned here only to correct an error in my Tertiary 

 Insects, where it was credited to Scarboro', Ontario, on the shores of Lake 



