90 T'ERTIARY RHYNCHOPHO.BOUS COLEOPTERA. 



Pachylobius deleticius. 



PI. X, Fig-. 14. 



Tlio l)e;ik ill the only specinien known is liroken, Init what remains 

 shows tluit it is at U\ist nearly as long as the proiiotuiii, eqnal, inoderiitely 

 stont, as lirond ;is the longer nxis of the eve, and gently arcuate. I'rotliorax 

 rather hiieh |iuiictuate. Elytra id lout two and a third times longer than 

 broad, snl)e(|iial, the humeral aiiglr hroadly rounded oH', the apex rounded 

 subacuminate, with nine series of deeply nnd sliarply iiiij)ressed l)ut rather 

 small eirciilar punctures, excejiting the eiglith series barely channeled be- 

 tween the ])iiiicta, to form a stria, the eighth and ninth series approximate, 

 the innicta of aii\' given row seiiarated by about their own diameter, nearly 

 or quite as deejily impressed next the apex as at the base. 



Length of elytron, 3-S"""; lireadth, VC,""". 



White river, Utah, from the very highest beds on the northern buttes, 

 next the Colorado line. One si)ecimen, No. 709, U. 8. Geological Survey. 



Pachylobius compressus. 

 PI. X, Fig. 11. 



The someAvhat abundant remains consist of elytra only, and lisually of 

 single elytra. Thev have the same projiortion iis in the preceding species, 

 but are one-half larger, distinctl}' though slightl\- arcuate, tapering from 

 the middle by the considerable curve of the outer margin, the apex subacu- 

 minate, the humeral angle rather prominent l)ut rounded. There are eight 

 series of delicatel\' and rather .slightlv punctured, slender, and shar])ly im- 

 pressed stria' (the punctures and tiiially the middle stri* fading next the 

 apex), besides a ninth impuncture(l marginal stria. 



Length of elytron, f)--) - 6-2"-", average, A'd"'"'; lirendth, 2-2 - 2-.^)™™ 

 average, 2-4""". 



Roan mountains, western Colorado, from the richest beds at crest of 

 bluff overlooking the head wntei-s of East Salt creek. Nine specimens, Nos. 

 138, 166, 197, 268, 280, 94S, 1()4(), 1049, 10r)2, U. 8. Geological Survey. 

 From near the same lieds in the same locality. (_)ne specimen. No. 63, 

 U. S. Geological Burvey. (Ti-een River, Wyoming, from the bluffs behind 

 the town. (.)ne specimen, No. 998, U. S. Geological Survey. 



