12 TERTIARY COLEOPTERA OF NORTH AMERICA. 



The volume is, therefore, mainly a treatise on the Adephagous and 

 Clavicorn Coleoptera of Florissant, but is at the same time a catalogue of 

 all hitherto known or here published non-rhynchophorous Coleoptera of 

 North America (26 families, 125 genera, 210 species) As in the volume 

 on the Rhynchophora, I have prefixed to each genus and family a summary 

 of our knowledge of the extinct forms in the given group, brought up to 

 the date of writing (August, 1896). 



I still retain the hope of completing the history of our fossil Coleoptera, 

 if not by extended memoirs embracing long series, at least by the publica- 

 tion of more limited papers upon separate families. The material therefor 

 is vast, but other engagements prevent rapid execution of my desires. 



DESCRIPTIONS OF SPECIES. 



More than two hundred species of Carabidse have been found fossil, 

 referred to fifty-four g-enera, of which six are regarded as extinct. Thirt}-- 

 two of these species, belonging to fourteen genera (of which only two are 

 not otherwise recorded as fossil), are i-ef erred to existing species and occur 

 only in the Pleistocene of Europe. Omitting these, there are one hundred 

 and seventy-two fossil species, of which fifty-four (of twenty-four genera) 

 belong to the Pleistocene, twenty-seven species of fourteen genera in the 

 Old World, and the same number of species of ten g-enera in North America. 

 From the older Tertiaries, one hundred and eighteen species are known of 

 forty-four genera (six extinct), viz, eighty-five species of thirty-four genera 

 (five extinct) in the Old World, and thirty-three species of twenty-six 

 genera (one extinct) in the New World. No species have been found on 

 both continents. Of the foi'ty-four genera from the older Tertiaries, thirty- 

 four are found in the Old World, nineteen in the New, and nine in both. 

 Fourteen genera are represented both in the older and latest Tertiaries. 



CYCHRUS Fabricius. 



The only fossil species of this genus known are the two here recorded 

 and one other, C. rostratus Linn., a recent species, stated by Flach to occur 

 in the Pleistocene of Hosbach, Bavaria. 



