i.eare-t resemblance. Its relations to I*, hindei arc verv much the same as 

 those of I' rnbripes to 1*. crenistriatus, the stria- being deeper and coarser 

 than in I', hindei and the punctures larger and heavier. Though the 

 humeral angle is scarcely so prominent as in I*, hindei, the texture of the 

 sin-face is scarcely different, unless in being slightly more marked, while in 

 P. crenistriatus there is no reticulation <>r cross ribbing whatever. The 

 earlv union of the tifth and sixth striie again marks its atlinitv with 1'. 

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

 variable. 



Length, 4.65"""; breadth, 1.5""". 



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

 Nos. 14520, 14524, 14525 (G. .1. Hiiule). 



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

 Ball. 



PLATYNUS DISSIPATUS. 

 Pi. 1, P.'-. 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 tin- 

 stria 1 , 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 stria- 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 tin- 

 base as tin- width of the elytron. 



I'.ivadth of elytron, 1 .5 mm . 



Interglacial clay beds of Scarboro, Ontario. Two specimen-. Noa 



iir.i:., 1 1:><;;; ;. J. Ilinde). 



Pl.ATYNUS DESITETUS. 

 I'l. I, Kitfs. 43, 51, 58. 



This, tin- laru>->t of the species from the clav beds of the C'anadian 

 border, i- more m-arl\ allied to 1'. crenistriatua !.><'. than t anv other liv- 



