124 TERTIARY RHYNCHOPHOROUS COLEOPTERA. 
ally to refer it here. Unfortunately it is not complete, but it is apparently 
about two and a third times longer than broad, tapers rather rapidly in the 
wpical third by the strong curvature of the outer margin, has a rectangular 
apex, and is furnished with ten series of impressed punctate striz, the puncta 
rather large, rather deep, but not sharp, and the interspaces smooth and 
alternately flat and strongly arched so as then to form dull carine, a feature 
reminding one somewhat of Rhyssomatus. 
Length of elytron, 46"; breadth, 2™™. 
Roan mountains, western Colorado, from the richest bea at summit of 
bluffs facing head of East Salt creek. One specimen, No. 1026, U. 8. Geo- 
logical Survey. 
RHYSOSTERNUM (pvoo0s,o7épvor), gen. nov. 
Having the general aspect of Rhyssomatus (to which the late Dr. Le- 
Conte called my attention), but with an unusually long beak, prominent 
postocular lobes, and altogether different sculpturing of the elytra; it would 
appear, however, to belong in the same group. Body ovate, somewhat 
elongate. The Bene is longer than the head and thorax together, sometimes 
more than twice as long as the prothorax, and strongly arcuate. The an- 
tenn are not very clearly preserved, but the funiculus and club together 
are fully two-thirds as long as the beak, and apparently the first joint of the 
former is long, while the succeeding are much shorter and subequal, the final 
ones half as broad again as the second. The prothorax is much higher than 
long, with prominent postocular lobes, due largely to a deep angular rounded - 
emargination at the middle of the sides; its surface is sinuately and longi- 
tudinally strigose, as in Rhyssomatus. The elytra are simply but very dis- 
tinctly punctato-striate, without carination; the tenth stria is abbreviated. 
Two species are known, both from Florissant. 
Table of the species of Rhysosternum. 
Beak more than twice as long as the prothorax, reaching the end of the metasternum; 
puncta of the elytral strix distinctly longitudinal..-............--.--. longirostre. 
Beak less than twice as long as the prothorax, reaching the end of the mesosternum; 
puncta of the elytral strie distinctly cirecular........-....----.--..-- eternabile. 
