COLEOPTERA— CARABID.E. 52 1 



uearest resemblance. Its relations to P. hindei are very much the same as 

 those of P rubripes to P. crenistriatus, the striae being deeper and coarser 

 tlian in P. hindei and the punctures larger and heavier. Though the 

 humoral angle is scarcely so prominent as in P. hindei, the texture of the 

 surface is scarcely different, unless in being slightly more marked, while in 

 P. crenistriatus there is no reticulation or cross ribbing whatever. The 

 early union of the fifth and sixth striae again marks its affinity with P. 

 hindei, and the sutural stria is of much the same character, though slightly 

 variable. 



Length, 4.65"'"'; breadth, l.S""-". 



Clay beds of interglacial age, Scarboro, Ontario. Three specimens, 

 Nos. 14520, 14524, 14525 (G. J. Hinde). 



Named in honor of the veteran New York paleontologist. Prof. James 

 Hall. 



Platynus dissipatus. 



PI. 1, Fig. 37. 



This species, which is of the same size as P. halli and agrees with it in 

 its general features and in the minute texture of the surface, is separated 

 from it solely on account of the grosser sculpture of the elytra, since the 

 striae, which are equally broad, are much shallower — a characteristic which 

 applies as well to the punctures — and are less distinct on the sides than on 

 the interior half Neither of the fragments is perfect, though one has all but 

 a little of the tip and permits us to see that the fifth and sixth striae would 

 unite early, as in those species, did they not fade out altogether before unit- 

 ing. There is at least one puncture in the third interspace as far from the 

 base as the width of the elytron. 



Breadth of elytron, 1.5'"'". 



Interglacial clay beds of Scarboro, Ontario. Two specimens, Nos. 

 14515, 14563 (G. J. Hinde). 



Platynus desuetus. 



PI. 1, Figs. 43, 51, 58. 



This, the largest of the species from the clay beds of the Canadian 

 bordei', is more nearly allied to P. crenistriatus LeC. than to any other liv- 



