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ORNITHOLOGICAL NOTES FROM THE WEST. 351 
five weeks of so extended a region that we saw all the species to 
be found there at the time of our visit, though we can hardly have 
= failedto notice many that were common. The water birds we had 
few opportunities to observe. Among the Gralle the greater and 
lesser tattlers (Gambetta melanoleuca and G. flavipes) the solitary 
and red-backed sandpipers (Rhyacophilus solitarius and Pelidna 
Americana) and the field plover (Actiturus Bartramius) were the 
only species seen besides the spotted sandpiper and plovers al- 
ready mentioned ; and these were only met with at Lake Pass, 
the second week in August. The only heron obseryed was one 
seen at a distance near Denver; and swimming birds were almost 
equally few. The absence of all flycatchers of the genera Tyran- 
rus and Myiarchus in the mountains, and the scarcity of the Syl- 
vicolide were noticeable features. The absence of the former at 
localities above seven thousand feet is not surprising, since they 
are emphatically southern forms; but we confidently expected to 
meet with a greater variety of warblers. 
Tn conclusion, a few remarks on the ornithological faunz of the 
region under consideration. Although the elevation of the Plains 
at the eastern base of the Rocky Mountains, in Colorado, is 
Senerally not far from six thousand feet, reaching seven thousand 
eet only on the divide between the waters of the Platte and the 
Arkansas at “ Lake Pass,” we have both at Denver and Colorado 
City a comparatively southern fauna, analogous in all essential 
features to the Carolinian fauna of the Eastern Province. From 
base of the mountains up to about seven thousand five hundred 
feet we find a fauna more nearly analogous to the Alleghanian or 
to that of Southern N ew England. Thence upward to about ten 
c and five hundred feet we have a zone more resembling the 
SARPA fauna of the East, or that of northern New England. 
“tom this point upward to the timber line the fauna is more anal- 
ogous to that of the Hudsonian, or that of the shores of Hudson’s 
7 y and the valley of the McKenzie River. Above this we have 
_Tegion dotted with snow fields, where are found several essen- 
oY arctic forms, ° 
