158 TERTIARY RHYNCHOPHOROUS COLEOPTERA. 



Tribe HYLURGINI. 

 Tliis trilx' is re presented in the European Tertiaries liy two species of 

 ITvlcsiuus, found at Aix and Brunstatt, an undescribed species of Hylnrf^-us 

 recoonized b\- Scrres at Aix, and an amber species referred to Hylesinites 

 ])\ Gerniar. In America a species of Hylesinus occurs at Florissant, one 

 of Polygrapluis at the Roan mountains, and borings referred provisionally 

 to Hylastes in the interglacial beds at Scarboro, Outano. 



POLYGRAPHUS Erichson. 



A northern genus with only two species, one belonging to the Old 

 World, tlie otlier to the New. The single fossil species referred below to this 

 genus can certainly, from its much stouter form, not properly fall here, and is 

 placed here only because it does not appear to l)e very distant from it. No 

 fossil species has ever before been referred to this genus. 



PoLYGRAPHUS WORTUKNI. 



PI. XII, Fig. 13. 



A dorsal view of a single si)ecimen showing prothorax and^lytra is all 

 that is preserved. Tlie prothorax tapers rapidly forward, 'o-ith rounded 

 sides and a stronglv convex front, giving a ])araboloid curve to the front 

 of the body; il sliows a verv faint median longitudinal impression and is 

 pretty uniformh- punctate, the puucta showing a tendency to a longitudinal 

 arrano-emeut, being more distant from those at either side than from those in 

 front and behind: there are besides some finer punctuations on tin- ilisk. 

 Elvtra more tlian half as long again as their eombined breadth, broadest in 

 the middle and then rapidly tapering so as to make the form of the body 

 ])yvt\y regularly long oval; the elytra are more distantly punctate tlian the 

 prothorax. but the i)uncta are slightly larger and arranged in tolerably 

 reo-ular serial rows, in all about a dozen rows, separated by twice the 

 diameter of the ])uncta, the puncta of the same row similarly separated. 



Length. 3"""; breadth, l-7o°™. 



Roan mountains, western Colorado. One specimen, No. 959, U. S. 

 Geological 8ur\ey. 



Named in memory of the IlUuois paleontologist, the late Prof. A. H. 

 Worthen. 



