130 Wyoming Experiment Station. 



558. Zonotrichia albicoUis (Gmel.). 

 White-throated Sparrow. 



Summer resident; but there are very little data in hand, 

 and nothing can be said of its distribution or abundance. The 

 Check List, 1895, notes, "Breeds in Montana and Northern 

 Wyoming," etc. Ridgway notes (Bull. 50, Birds of North 

 and Middle America, p. 345) that it has been taken on the 

 North Platte river ; but does not refer to collector. Dr. Jesur- 

 un has the only specimen that I have seen from Wyoming. 

 He took this on Oct. 8, 1894, at Douglas. 



559 a. Spizella monticola ochracea Brewst. 

 Western Tree Sparrow. 

 Probably resident; common. These birds are most num- 

 erous in fall and spring, but they have been taken at all times 

 in the year. They are most abundant on the Laramie plains 

 during November and April. The records are numerous. 

 Hayden reports them from Laramie peak for the months of 

 January and March ; Coues notes a dozen specimens taken from 

 various, IjDcalities; Wood took a specimen at Pole creek Aug. 

 2, 1857; Drexel found them at Fort Bridger, 1858; Bond re- 

 ports them common at Cheyenne; Jesurun, common at Doug- 

 las. There are seVen specimens in the University collection 

 that have been taken on the Laramie plains. Holden reports 

 them from Sherman; Stevenson from Green river, Henry's 

 Pork and Rock creek. 



560. Spizella socialis (Wils.). 

 Chipping Sparrow. 



Probably a summer resident ; but rare. The record of this 

 species in the state comes from the National Museum. Speci- 

 men No. 38477 was taken at Laramie peak and No. 11213 at 

 Fort Bridger. It is quite probable that it may be common 

 along the eastern border of the state. 



