6CUDDER.] CANADIAN FOSSIL INSECTS. 49 



ally in the distant union of the fifth and sixth stride, is most nearly allied 

 to the largest. Its outer margin is well rounded, scarcfely marginate, the 

 humeral angle tolerably prominent but well rounded ; the strise are coarse 

 and deep, with rather heavy but not very distinct punctures, scarcely 

 broadening the stripe, while the piceous surface is delicately and rather 

 faintly cross-ribbed. The marginal stria is obsolescent. There are appar- 

 ently two or three interspacial punctures. It is very small for a Platynus. 



Length of elytron, S-Q"""' ; width of one, 1-35""". 



Interglacial clays of Scarboro,' Ontario. Two specimens, Nos. 14475,. 

 14480— G. J. Hinde. 



Named in memory of my fellow-student. Prof. C. F. Hartt, formerly 

 director of the Geological Survey of Brazil. 



Platynus dilapidatus. 



PI. Ill, fig. 2. 



This species of Platynus is very different from those described above 

 from the same deposits, and does not fall into the peculiar group which 

 they form. It belongs rather in the near vicinity of P. macidicollis Dej. 

 The single elytron, which is a fragment only, but which represents a species 

 apparently fully as large as this, has a very flat surface, with coarse and 

 rather deeply impressed strise very different from P. macrdicollis, without 

 punctures, so far as can easily be seen on the upper surface, though they 

 are barely perceptible and the under surface gives distinct signs of them, 

 the interspaces dotted with microscopic scattered pustules, much as in the 

 modern species mentioned, though without the clean and sharp reticulation 

 which is found in it, but instead an excessively fine and faint cross-rib- 

 bing, too fine to appear on a drawing of the size of ours. The sutural 

 stria is very short ; the colour of the whole dark castaneous. 



Length of fragment, 2-65'"™. 



Platynus maculicollis is found in Oregon, California, Arizona and Gua- 

 deloupe Island. 



Interglacial clay beds of Scarboro', Ontario. One specimen, No. 14513 

 —Dr. G. J. Hinde. 



