6H TERTIARY RnY^CHOrEOROUS COLEORTERA. 



sli<j!-litly .sliorter than the lieiul, the U]Ji)er margin strongly curved, tlie apex 

 oblicjue. Protliorax more than lialf as liigli again as long, scarcely taper- 

 ing, l)ut little arclieil al)o^•e, the surface l)linitU- rui>'oso-i)unctate, heaviest 

 above. El}-tra ^\itll not very feebl}' impi-essed j)unctate stria', the inter- 

 spaces faintly i)mictate. Legs ap})arently rather short, but none of the 

 specimens show tlu'iii well. Abdomen very linely punctate, the metas- 

 ternal episterna very bntad. 



Length, excluding rostrum, 3-S5""" ; rostium, UT""" ; elytra, 2-5™"'; 

 height of body, 1-4""". 



Green River, W}oming. Three specimens, No 100, Dr. A. S. Packard, 

 from the Fish cut; Nos. 712, 719, U. S. Geological Survey, from the blufts 

 behind the town. 



SiTONA PAGINARUM. 



I'l. X, Fig. 1. 



The head is short, fulh' twice as high as long, and smooth ; eye circular, 

 rather small, removed tVom the front margin of the prothorax by about half 

 its own diameter; rostrum moderately stout, twice as long as the head, equal, 

 rather bluntlv rounded at the apex, and smooth. Thorax rather shorter 

 than high, truncate at each extremity, with no ocular lobes, very gently 

 arched aliove, the surtace very faintly and transversely ruguh)se. Elytra 

 with feebly impressed inmctate stria-, very gently arched except posteriorly, 

 where they are rajiidly declivent. Leffs not very stout and rather short. 



Length, excluding rostrum, il"""; rostrum, 1°""; elytra, 4"-"'; height of 

 body, 2'""'. 



Roan mountains, western Colorado, in and very near the richest beds 

 on the blufts at the head of East Salt creek. Three specimens, Nos. 182, 

 958, 1060, U. S. Geoloi^icnl Survey. Green River, Wyoming, from the 

 blutfs behind the town. One specimen, No. 72(1, U. S. Geological Survey. 



Subfamily ALOPHIN^S. 



The Alophiufe have a remarkable development among the fossils of 

 the American Tertiaries, and nearly all the forms belong to extinct tyjjes. 

 P\)ur genera with fourteen species are recognized and the latter, with but 



