ADEPHAGOUS AND OLAVICORN COLKOPTERA 



OF FLORISSANT. ^ 



By SAMUEL H. SCUDDER. 



' 



INTRODUCTION. 



In Monograph XXI of tlic United States Geological Survey the 

 rhynchophorous Coleoptera of North America are fully treated. It was 

 considered as " a first installment toward a history of our fossil Coleoptera," 

 which it was then intended should he followed hy several other similar 

 volumes treating in succession the other great divisions of the Coleoptera. 

 The reasons for first undertaking the publication of the Rhynchophora 

 were given in that volume. \Vork had, however, already progressed at the 

 other end <>t the Coleopterous series, as explained in my report of Julv 1, 

 1887, ' and at that time nearly all the descriptions in the present volume 

 had heen drawn up. Change of circumstances has prevented me from being 

 able to carry out the work as I had planned, and accordingly the present 

 volume has heen undertaken to complete temporarily the ( Joleopterous series. 

 All the hitherto published non-rhynchophorous Coleoptera are catalogued, 

 and in their proper place are given descriptions of all new forms and of those 

 few species (five in number) and genera (two) which had been published 

 in scattered papers by the United States Geological and ( ideographical Survey 

 of the Territories. These new descriptions are almost exclusively confined 

 to the Adephagous and Clavicorn families, and include all the species in 

 these families known to me from the Florissant basin. Those from other 

 Western deposits have not been studied or, indeed, assorted from the con- 

 siderable mass of still unstudied material in my hands, most of which has 

 come into my care within the last nine years, i. e., since these studies were 

 undertaken. 



'Eighth Ann. Kept. V. 8. Geol. Survey, ]>p. iss-lstl. 



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