CURCULIONID.E— CL'KCULIONIN.E— CKYPTUltn YNCIUN I . i 2)3 



Lcngtli, cxcludiny- nistruiii, 3"""; rostrum, U'7"""; lit-iylit of l^»»dy, 



Florissant, Colorado. One specimen, No. 4496. 



( Jymxetkon lkcontki. 



Gymnvtron Icvontei ►Sciulil., Jiull. U. S. Geol. Geogr. yiirv. Tt'ir., iv, 707 (187.S); Tcrt, 

 lus.N. A., 471-472, PI. VIII, Fig. 20 (1890). 



Named for the late Dr. .lolui L. LeConte, of Philadcljiliia, whose works 

 on the Rhynchophora of this country have formed the substantial basis of 

 till:- present inouogTaph. 



It is dinibtful if this be a Gynmetron; its depth <>!' liddy is too great, 

 in th:it respect, at least, resembling- ratlier a Mononyciius. No further 

 specimens have been obtained. 



(Ireen River, Wyoming. 



Tribe CRYPTORHYNCHINI. 



This tiibe, so well ileveloped in the recent American fauna, is relatively 

 very unimportant in the Tertiaries. In Kurope the genera Acalles and 

 Chalcodei-mus, with one species each at Rott and at Kutschlin, are ;dl that 

 have l)een recognized, excepting tlu-ee species of C'ryptorhynchus at Aix, 

 Rott, :nid P)runstatt. Tn .Vnieriea we have also three genera, liut as many 

 as seven species, four of them referred to Cryptorhvnchus, in equal num- 

 bers from the Lacustrine and the (iosiute faun is ; one, from the Koaii 

 mountains to Rh)-.ssomatus, and two, from Florissant, to an extinct genus, 

 Rhysosternum. 



RlIY880.MA'rrS Seh.-.nherr. 



An American genus especially abundant in the tro{)ics, but of wliich 

 North America possesses five species, mostly contined to the southern .states. 

 A single species has been found fos,sil in the Roan mountain.s, CJolorado. 



Rhyssomatu.s tabescen.s. 



PI. XI, Fig. !l. 



A single elytron from the Roan mountains is .so difTerent from anvthing 

 else yet found in tertiary deposits that I venture to descril)e and j)ro\ision- 



