520 TERTIARY INSECTS OF NORTH AMERICA. 



are filled with irregular shallow punctures, which run more or less together 

 so as to form interrupted, longitudinal, adventitious series between the strife. 

 The intimate texture of the surface is much as in P. halli, the fifth and 

 sixth striae meet at a distance from the tip and the sutural stria is obsolescent 

 and brief. 



Length, 4 7 mra ; breadth, 1.6 mm . 



Interglacial clay beds, Scarboro, Ontario. One specimen, No. 14523, 

 (G. J. Hinde). 



PLATYNUS HINDEI. 



PI. 1, Fig. 54. 



A number of fragments occur of a species which seems to be allied to 

 P. rubripes Ziimn., but is much smaller than it and differs from it consid- 

 erably. The shape of the elytron is much the same as there, but the 

 humeral angle is more pronounced, the strife are rather coarser and perhaps 

 a little more heavily punctate, while the interspaces, instead of being 

 faintly and shallowly punctate, are not only very faintly and irregularly 

 transversely corrugate, but the fine sharp reticulation of the living species 

 seen under strong magnifying power is entirely absent from the piceous 

 surface of the fossil, being replaced by a scarcely perceptible dull trans- 

 verse ribbing. The fifth and sixth stria? are also united only a little beyond 

 the middle of the outer half of the elytron, and the sutural stria is very 

 short indeed and generally inconspicuous. 



Length, 4.6.5" ; breadth, 1.5 mm . 



Clay beds of interglacial deposits, Scarboro, Ontario. Nine specimens, 

 Nos. 14512, 14514, 14518, ;i4528, 14533, 14544, 14546, 14554, 14562 

 (G. J. Hinde). 



I take pleasure in dedicating this species to Dr. G. J. Hinde, to 

 whose industry and zeal we are indebted for the interesting series of 

 interglacial Coleoptera shown on Plate 1. 



PLATYNUS HALLI. 

 PI. 1, Fig. 41. 



Another species of Platynus, allied to P. crenistriatus LeC., is still 

 more nearly related to P. hindei just described, and is of the same size, and 

 therefore considerably smaller than the living species, to which it bears the 



