10 TERTIARY RIIYNCIIOPHOROUS COLEOPTERA. 



(4) A very considcralile imiiil)er of genei'a are extinct, often including 

 a niiinl)er of species. 



(5) Existing genera \\liicli are repi'esented in the American Terti'aries 

 are mostly American, not infrequently subtropical or tropical American, 

 and where found also in tlie Old World are mostly those which are common 

 to tl le North Temperate zone. A warmer climate than at present is indicated. 



((;) There are no extinct families, but in one instance an extinct siib- 

 family with numerous representatives. 



(7) The Tertiary European fauna is nearer than our own Tertiary 

 fauna to the existing American fauna in the relative i^reponderauce of its 

 families, subfamilies, and tribes. 



These conclusions are almost identical, word for word,' with those 

 reached from a study of the Tertiary Hemiptera of the United States, 

 although in that study a far more meager representation of the Gosiute 

 fauna was at hand. 



Besides a mniiher of specimens which could not be definitely placed, 

 thei'e have been examined in tlit- preparation of this monograph 753 speci- 

 mens of Rhynchophoi-a, of whicli 431 come from Florissant and 320 from 

 the Gosiute fauna. 



Three of the plates which accompany this monograph were put upon 

 stone man}' years ago and before a careful study of the material. Conse- 

 quently several species appeal- on them which are not Rhynchophora at all. 

 Thfese have all been described, and the descriptions will in due titue and 

 place be published, l)ut in tliis volume only the names are given, in the 

 Explanation of Plates i and ii. 



In the enumeration of the specimens at the end of the specific descrip- 

 tions, tlie numl)ei's of tlie obverse and reverse of the same specimen are 

 always connected I)}- "and" witliout any intervening comma, and this typo- 

 graphical method is enqdoyed only in exjiressing this relation. 



My warm thanks are due to Mr. Samuel Ilenshaw, of Cambridge, for 

 liberal aid witli liis nillcction and by his personal knowledge of living forms, 

 botli of whicli have l)een oi' the greatest service to me. 



' Proc. Boat. Soc. Nat. Hist. Vol. xxiv, pp. 564-565. 



