46 TEKTIAIIY ItUYNCHOPHOKOUS OOLEOPTEEA. 



tlicir entire len<>tli, tlie surface inicroscopically ])unctate with fluseh- 

 crowded, very shallow punctures runniiif)- into each other laterally, so as 

 to effect a faint and exceedingly delicate transverse wrinkling; besides 

 which then* are longitudinal rows of rather large, dee]), circular punctures 

 (l)ead-like elevations in this cast) removed from each other by considerably 

 more thnn their own diaiiieter. 



Lengtli of elytron, 4"'"'; l)readth, 1 •■_>""". 



Roan mountains, western Colorado, from close to the richest beds at 

 the summit of the cliff at head of P^ast Salt creek. Cue specimen. No. 1, 

 U. S. Geological Survey 



OTIORHYNCHITES. 



Ei-itsch has employed this term for the elytron of a Coleopterous insect 

 from Secondary rocks i)lainly l)elonging to the Rhynchophora. It is here 

 used for certain Tertiary elytra, most of them bearing a close resemblance 

 to those of < )tiorhynchus, merel}- to indicate their general afHnities. They 

 are much larger than our native species of Otiorhynchus. Four species are 

 described, two from the Roan mountains, Colorado, one of these also from 

 Cli-een river, and one each from Fossil, Wyoming, and Florissant, (Jolorado. 



Tabic of the species of Otiorhynchifes. 



Markings of elytra relatively dflicate. 



Outer iiiarjiin of elytra nearly parallel to inner ahsentivus. 



Outer niarj;iu strongly convex. 



Intersi)aees between the stria- fiat tysnni. 



Interspaces between the strive strongly convex fossilis. 



Markings of elytra exceedingly heavy comnmtatus. 



Otiokhynchites absentivus. 



PI. IX, Fig. 13. 



Elytra somewhat elongated, subparallel with Avell rounded apex, with 

 ten rows of moderately deep punctate stria', subconfluent and evanescent 

 at the tip, the tenth stria entire, the puncta circular, with a slight 

 tendency to become longitudinal, moderately deep, each separated from its 



