GENERAL REMARKS ON THE BASIN AVIFAUNA. 381 



BoUclionyx oryzivorns were more or less common in the fall. In the Wah- 

 sntch disti'ict, including' the Salt Lake Valley, were Tnrchis fnsccsceus, GaJc- 

 oscoptes caroUnensis, Setophaga ruticiUa, and Zonotrichia leucoplmjs as abundant 

 summer residents, and Melanerpes erythrocephalus as a summer straggler; 

 while on Kamas Prairie, between the Wahsatch and the Uintahs, Aditiirus 

 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 were 

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

 in the Truckee Valley, in June and July, and CofKnucuIus 2)«sscriiiiis, ^Y\ndl 

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

 also, Spisella 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 (Octobei") and the Truckee 

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

 though it may possibly have been C. chrysoides 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 C. mcxkanus, known as C. 

 '^kyhridus."^ 



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 these species, the following are known to occur westward of the 

 main divide of the Rocky Mountains : — 



1. Deudroeca blackburnias; Ogden, Utah, Sept. — AUen. 



2. Dendrceca coronata ; Fort Bridger, Wyoming. — Baird. 



3. Seiurus noveboraceusis ; Fort Bridger, Wyoming.— Baird. 



4. Cistothorus stellaris ; Utah Lake; breeding. — Hemhaw. 



5. Vireosylvia olivacea ; Ogden, Utah, September. — Allen. [" More or less common"]; 



Fort Bridger, Wyoming. — Baird. 

 G. Junco hyeraalis ; Iron Springs, Utah, October 4. — Hemhaw. 



7. Melospiza palu.stris; Washington, Utah, October 23. — Eenshaic. 



8. Qniscalus aeueus; Fort Bridger, Wyoming — Baird. 



9. Empidonax minimus; Fort Bridger, Wyoming. — Baird. 



10. Rallus elegans ; Ogden, Utah, September. — Allen. 



11. Ibis alba; Ogden, Utah, September.— ^i/e)t. [" Said to bo frequent in summer."] 



12. Anas obscnra; Knsii Lake, Utah, November. — Yarrow. 



