112 EXPLORATIONS AND SURVEYS WEST OF 100TH MERIDIAN. 



This and the preceding species are perhaps the most common and 

 generally distributed in the West of the sparrow- tribe. They both 

 frequent much the same localities, but the Grass-Finch is more con- 

 stantly found on the dry plains, and entirely away from the vicinity of 

 water. 



62. Coturniculus passerinus (Wils.), var. perpallidus, Kidg. Western 



Yellow-winged Sparrow. 



Found abundantly over the same area as the Baird's Bunting. The 

 specimens obtained are all typical of this race, and differ very decidedly 

 from the eastern form (passerinus) in the general predominance of the 

 light tints through the entire plumage. 



C3. Zonotrichia leucophrys, (Forst.) White-crowned Sparrow. 



Exceedingly abundant in the fall in the valleys of the San Pedro and 

 Gila Rivers, Arizona. Frequents the bushes, more particularly the wil- 

 lows along the small streams. 



Iris brown 5 bill above dusky-brown, below lighter; feet and legs 

 light-brown. 



64. Zonotrichia leucophrys (Forst.), var. intermedia, Ridg, GambeFs 



Finch. 



Arrived from the north rather later than the preceding. Found 

 equally abundant in same localities, and associating together. 



