OTIILK TKKT1AKY INSECT LOC'A L1T1KS. ;',7 



his pasvi-e down the river on horseback in isil.'i. mid his brief and cnrsorv 



account of the geological structure of tilt' region is, 1 believe, (lit- first :ini| 



only one until tin- parties of the Ha\ den Survey enieivd ihe region ten or 

 i . o 



inniv years later. Brief reports of the ideological and topographical chaiactei 

 of i lie country were made by I >rs. ( '. A. White and I 1 '. M. Kndlich, and 

 ilessr- <i M ( 'liiitenden and (i. R. Bechler. None of these, however, 

 obtained any inject--, excepting 1 >r. \\'liite. \vho in a single locality found a 

 fe\v poor specimens. On a visit to the place in the summer of ISX'.i, how- 

 ever, I was alile to rediscover the beds in which thev were found l>v .Mr. 

 I >entoii east of the ( 'olorado- 1 'tali line, and to reatlv extend the stations at 

 which they could lie found. In the two localities on the. lower White River 

 where henton found fossil insects, "Chagrin Valley" and "Fossil Canon," 

 as he called them, the general topographical features were the same, bluffs 

 or lintfe- of a thousand or more feet in thickness being composed of evenly 

 bedded stratified deposits. "Chagrin Yalle\ " must be identilied with the 

 \-alley of 1 >MII^!;IS ( 'reek, though it was not hen' hut live or six miles lower 

 down the White River that Denton really obtained his fossils, at a point 

 where, to one traveling westward, (Jreen River beds first appear in mass and 

 are readily accessible, probably in the immediate vicinity of ('anon P>utte, 

 where the old Indian trail on the south side of the ri\ er cuts oil' a sharp bend 

 and pa.-scs directly over many favorable outcrops. It was in iact at pre- 

 cisely this place that I obtained from the rocks collections airreein^- most 

 cl.^ely in ".viieral appearance and character with those -eciired by henton 

 This locality is in ( 'olorado a few miles ea<t of the I'tali boundary. His 

 other locality is represented by him to be lil'ty or>i\tv miles farther down 

 the river, but still at some distance from its mouth. The distance is no 

 doubt exaggerated, and the locality on the north side of the river, certainly 

 in Utah, not improbably near the mouth of Red Bluff Wash. I made no 

 search for this place. 



It may in brief be said that the Green Riverbeds in the bluffs on each 

 side of the White River Canon near the boundary line between Utah and 

 Colorado, but especially on the northern side, are tilled for over a thousand 

 feel with insect remains;, the highest and the lowest beds respectively 

 yielded me the best results, hut hardly a level could be found where patient 

 search did not reveal some relics, though perhaps of no value: the more 

 prolific beds were oftentimes simply crammed with remains, frequently in 



