GENERAL REMAIIKS ON THE BASIN AVIFAUNA. 381 



J)olirJio)ii/x onjzivorus were more or less comniuu in the iiill. lu the Wiili- 

 siitch district, including the Salt Lake Valley, were Turclus fuscescens, Gale- 

 oscoptes carolinensis, Sdophaga riUicilla, and Zonotrichia Icncoplmjs as abundant 

 summer residents, and Melamrpes erythroccphalus as a summer straggler; 

 while on Kamas Prairie, between the Wahsatch and the Uintalis, Aditurus 

 hartramius was-common in July. 



Another result of our investigations was the discovery of the fact that 

 several species, supposed to be peculiarly eastern, are in reality among 

 those which inhabit the entire breadth of the continent. Among these wore 

 Coccyzus amerkamis, which was found both at Sacramento, California, and 

 in the Truckee Valley, in June and July, and Coturnicuhis i)assermus,yi\\\c\\ 

 was as abundant in the vicinity of Sacramento as at any eastern locality ; 

 also, Siiizella monticola, heretofore supposed to be of casual or accidental 

 occurrence in the West, but which was found to be an abundant winter res- 

 ident in suitable localities. There was also seen at two places in the western 

 depression — the "West Humboldt Mountains (October) and the Truckeo 

 Valley (November) — a Colaptes, which was probably the eastern C. auratus, 

 though it may possibly have been C. chnjsoides of the Gila and Saint Lucas 

 districts, since it is certain that the individuals in question were not the 

 form intermediate between C. auratus and G. mcxicanus, known as C. 



" hyhridus:'^ 



Somewhat of an anomaly was noticed in the distribution of several 

 species in the region indicated, in their abundance on the two opposite 



' In addition to tbese species, the following are known to occur westward of tlie 

 main divide of the Rocky Mountains :— 



1. Dendrojca blackbuniiiv ; Ogdon, Utah, Sept.— yll7fn. 



2. Dendrceca corouatii; Tort Bridger, Wyoming.— L'd/iv/. 



3. Seiurus uoveboracensis ; Fort Bridger, Wjoniing.—.Brt»Y?. 



4. Cistothorns stellaris ; Utah Lake; hrceding.— /7cH.s7t«»f. 



5. Vireosylvia olivacea ; Ogdeu, Utah, September.— .l/Zew. [^' More or less common"]; 



Fort Bridger, Wyoming.— i>'r(i/d. 

 G. .Tuneo hyenialis; Iron Springs, Utah, October i.—Hcnshaic. 



7. Melospiza palustris; Washington, Utah, October 2:i.—IIcnsha>c. 



8. Qniscalus jeneus; Fort Bridger, Wyoming— 7>'((i>(/. 



9. Knipidonax minimus; Fort Bridger, Wyoming.— /Jdi'ft/. 



10. Ralius olegans; Ogden, Utah, September.— .l/to*. 



11. Ibis alba; Ogden, Utah, September.— A»eH. [" Said to bo frequent in summer."] 



12. Anas ob.seura ; Ku.sh Lake, Utah, November.- larnxr. 



