30 TERTIARY COLEOPTERA OF NORTH AMERICA. 



Platynus harttii. 



Platynus harttii Sciidd., Tert. Ins. N. A., 622, pi. 1, fig. 31 (1890); Contr. Canad. 

 Palasont., II, 48-49 (1892). 



Clay beds of Scarboro, Ontario. 



Platynus c.esus. 

 Platynus cmms Scudd., Tert. Ins. N. A., 522-523, pi. 7, fig. 34 (1890). 

 Green River, Wyoming. 



Platynus dilapidatus. 

 PI. II, fig. 4. 

 Platynus dilapidatus Scudd., Contr. Canad. Palffiont., II, 49, pi. 3, fig. 2 (1892). 

 Clay beds of Scarboro, Ontario. 



Platynus tartareus sp. nov. 

 PL III, figs. 7-9. 



Somewhat nearly allied to P. sinuatus Dej. The antennae are longer 

 than the head and thorax together, the head as well as the thorax with a 

 median impressed line. Prothorax nearly half as broad again as the head 

 (not including the projecting eyes) which is a little narrower than the length 

 of the prothorax; front and hind margins squarely truncate, the sides 

 strongly arcuate, subangulate, broadest about the middle, none of the angles 

 rounded. Elytra with the humeral angle well rounded, the surface flat and 

 smooth with delicate strise and with apparently no interstitial punctures. 



Length of body, 11.4 mm.; breadth of elytra, 4.4 mm. 



Florissant, Colorado; four specimens, Nos. 2244, 3405, 8760 and 

 9252, 11363. 



G-ALERITA Fabricius. 



The following species is the only one known in a fossil state. The 

 genus is rather poorly represented in the United States, but is cosmopolitan 

 in nature. 



