oTiouiiVNciiiK.i: — (>i'iii;v As'i 1X1. 3y 



Tiihlr of the spcrits of Oplinittstitcn. 

 Elytra more than twici' as long a.s broad. 



Elytra hardly more tliaii twico as long as lnoad. 



Punctures ofstrhc larj;.- ami sl>all.,w aUconnm. 



Puncfun-s of stria, small ami .l.-ep cinerem. 



Elytra n.-arly or (juite two and a half times as loiif; as broad flif/nssus. 



IMytra less tliau twice as long as broad divptrtttui,. 



Ophkyastites AHSCONSUS. 

 IM. i\, I-V 1. 



this species is a little larger than either <>{' th.- .others and of a coarser 

 sti-iicture, and apparently was densely scah-.l; tl... int.i-spaces between the 

 striae are heavily and coarsely ridged, and the iMinctures moderately large 

 ••ind moderately deep, the stiiae themselves not deeply or at least not sharply 

 impressed. 



Length, 7"""; breadth, 3-2.5"'"'. 



Florissant, Colorado. Three sporimens, Nos. 50(1, 1009, 11309. 



Ophrvastitks cixereus. 

 PI. viii, Fi<r. 12. 



The single imperfect specimen of this sjiecies (the base of the elytra is 

 broken) appears to have been densely scaled like the last, but the interspaces 

 are scarcely ridged, being ..nly gently arclied, while the stria- an- deep, 

 iiarn.u-, and sharp, and the pnn<-tures still dee|)er and linely impre.ssed; 

 the proportions are apparently the .same as in tlie preceding species. 



Length ..f fragment. :>•""•; pn.bable length of el vtrou, 6 ■""•; greatest 

 breadth, 2-7r)"'"'. 



Florissant, Colorado. One specimen. No. 972, U. S. Geological Survey. 



Ul'UUYA.STITES niGRESSUS. 

 PI. I.X, Fig. 2. 



This species differs from the otlier two in the much more elongated 

 f.rm of the elytron, and in tlie more distinct inipres.sion, apically, of the 



