76 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



punctate, the sutural stria of moderate length, running from the base of 

 the second, stria to the first and about as long as half the basal breadth of 

 the elytron, the puncta of the proximal part of the marginal stria pro- 

 nounced ; the intervals are shallowly convex. In shape, striation and 

 punctuation it much resembles P. pusUlus, but it is piceous, the punctua- 

 tion is slighter, while the marginal puncta are more pronounced, the in- 

 tervals are flatter, and the sutural stria is quite different. The length 

 of the fragment is S.l"", its breadth 1"", and the probable length of 

 the elytron 4"". 



One specimen : No. 1 6803, Scarborough. 



P. pusUlus occurs in Canada, New England, Illinois and Missouri. 



Platynus interglacialis sp. nov. 

 PI. VIII, Fig. 2. 



The basal half or thereabouts of an elytron is all that remains of this 

 species. It shows a piceous flat field with delicately impressed impunctate 

 striae, a moderate free sutural stria, and the first stria arising close to the 

 base of the second. It is perhaps nearest, though not very close, to P. 

 moerens Dej., but it is a smaller species, the elytra probably not above 

 5"" long, of a more delicate texture and of a different colour. The length 

 of the fragment is 3°"°, and the width of the elytron l-S™. 



One specimen : No. 16773, Scarborough. 



P. moerens is reported from Canada, New York, Pennsylvania and 

 Louisiana. 



Platynus interitus sp. nov. 



PI. VIII, Fig. 4. 



A. bronze-green imperfect elytron preserves all the basal parts and 

 shows eight strongly impressed impunctate strise on a flat ground, the 

 sixth to eighth striae not reaching the base, the first stria bent angularly 

 to make room for the sutural stria and arising not far from the base of 

 the second stria; the sutural stria is short and likewise does not reach the 

 base. It seems to be intimately allied to P. cupreus Dej., differing mainly 

 in the arrangement of parts about the sutural stria, which is widely 

 separated basally from the first stria ; it has not the cupreous colour of 

 specimens of P. cupreus from Hudson Bay Territory, but agrees very 

 nearly in colour with specimens from Lake Superior described as P. pro- 

 tractus by LeConte. I am inclined to believe the fossil distinct. The 

 fragment is 3-6™™ long, and l-7°'°' broad; the complete elytron would 

 probably be 5°™ long. 



