176 



there is also a slight impress of the desert fauna of the Middle Prov- 

 ince in consequence of tlie arid nature of the Green Eiver district, 

 ■while along the eastern base of the mountains the peculiar fauna of 

 the Plains is the prevailing one upon the grassy foot-hills and prairies. 

 The following tables will show more clearly the distinct geograph- 

 ical elements in the Colorado avi-fauna. The species with an aste- 

 risk (*) prefixed were first found in Colorado by Mr. Aiken. 



I. EASTERN SPECIES FOUND IN COLORADO. 



1. Tardus fuscescens. 



2. Turdus Swainsoni. 



3. Galeoscoptes Carolinensis. 



i. Harporhynchus rufus. 



*5. Sialia sialis. 



*6. Helminthophaga peregrina. 



*7. Parula Americana. 



8. Dendroica coronata. 



9. Setophaga ruticilla. 



♦10. Passerculus savanna. 



11. Zonotrichia leueophrys. 



12. Junco hy emails. 



13. Spizella monticola. 



14. Euspiza Americana. 

 *15. Cyanospiza cyanea. 



IG. Dolichonyx oryzivorus. 



*I7. Icterus Baltimore. 



18. Icterus spurius. 



19. Quiscalus seneus. 



Supposed Western Limit. 



Salt Lake Valley ; breeding ; 

 common. Eidgway. 



E. Humboldt Mts., Nevada; 

 Sept. EiDGWAy. 



Islands of Salt Lake ; breed- 

 ing. Eidgway. 



Eastern base of Eocky Moun- 

 tains. Gov't Survey. 



El Paso Co., Col. Aiken. 



El Paso Co., Col. Aiken. 



El Paso Co., Col., May 11. 

 Aiken. 



Denver, Col. Wernigk. El 

 Paso Co. AiKKX. 



Islands of Salt Lake ; breed- 

 ing. Eidgway. 



El Paso Co., Col. Aiken. 



Wahsatch Mts. ; W. slope ; 

 breeding. Eidgway. 



Arizona. Coues. Utah. Hkn- 

 siiAW. Colorado. Aiken. 



Col. E. Kkxnerly. W. Na. ; 

 com. win. res. Eidgway. 



Denver. Ai.len. 



El Paso Co., Col. Aiken. 



Euby Valley, Nevada, Aug. 

 and Sept. Kidgwav. 



EI Paso Co., Col. Aiken. 



Denver, Colorado. Ai.i.kn 



Fort IJridgcr, Wyoming. 

 DuE.Ni.KiJ. Col. Aiken. 



