OTIORHYNCIIID.K. 29 



Lciifi-tli, cxcludiii','- rostrum, 4;)"""; lici<,dit, l-f)"""; lei)<ftli i>t rostnmi, 



1-7 '. 



Koaii iiHiuiitiiins, western Colonulo, in the most ])rc>liiic beds close to 

 the siiiniiiit. One specimen, Nos. 1015 and lOUi, U. S Geolo},ncal Survey. 



Named in lionctr of" tiie distinguished Holiemian paleoutohjgist, the late 

 Joachim liarrande. 



Family OTIORHYNCHID^E. 



Tlie Otiorhynchidiv are well represented in the American Tertiaries, 

 tile nuiiK ri<;il })reponderance of the species having then been much more 

 than double what it is now. But the most striking fact is its importance 

 for the Grosiute fauna, where 15 genera and 32 species occur, against 10 

 genera and 14 sjiecies at Florissant. Excepting in the Scolytida?, which 

 liave hut 4 sj)ecies in the western Tertiaries, and are thus relativel}' insig- 

 nificant, no other family shows a preponderance of forms in tlie Gosiute 

 fauna; and as the pre[)onderance is here very marked we may i'airh- regard 

 the ( )ti(prhvnchida; as thoroujjhlv characteristic of this fauna. It is a fur- 

 ther curious fact that the Florissant Otiorhynchidaj are mostly made up of 

 members of different tribes from the others, the Evotini an<l I'romecopini 

 belonging e.xclusively, or almost exclusively, to the Lacustrine fauna, while 

 the Tanvmecini, Uyphini, and Phyllohiini are exclusively, the more nu- 

 merous Ophrvastini and ( Hiorhvnchiiii almost exclu.sively, Go.sinte; the 

 Brachvderini alone are divided equally between ])oth. No other family of 

 l{hvnchoi)hora .shows in so striking a manner a division of tribes between 

 the two principal liori/.oiis of the western Tertiarv insect beds, and it is 

 therefore prot)able that the fossils of this famil\ ma\ in the future turnish 

 the best indications (as far as Khynchophora are concerned) of the horizon 

 of future insect localities in the West. 



In Europe the number of genera and species is far less than in 

 America, and the tribes Ophryastini. Evotini and I'romecopini, having hi 

 America fully two-fifths the genera and nearlv half the spe<'ies, do not 

 appear to occiu" at all, nor do any tribes occur in Eurojie which are nfit 

 found in .\merica, excepting the extinct tribe Pristorhvnchini, which is rej)- 

 resented by a single species. Even in the tril;es that are the same the 



