582 Colorado College Publication 



Lanivireo solitarius cassini. Cassin's Vireo. 



Rare; one taken at Palmer Lake, September 6, 1909, by 

 Alex. Wetmore. 



Lanivireo solitarius plumbeus. Plumbeous Vireo. 



Summer resident; common. Arrives about May 16; de- 

 parts early in September. 



Frequents park-like areas with scattered pine, from the 

 foothills to 9,000 feet. Aiken noted it at St. Peter's Dome 

 July 4, 1907. Common on the Divide and along the foothills. 

 On Turkey Creek he found the nests in small second growth 

 pines, some as low as four feet from the ground. It has been 

 found breeding on Cheyenne Creek at Ivywild. 



Mniotilta varia. Black and White Warbler. 



A single specimen of this warbler was taken by Aiken 

 on Turkey Creek in the autumn of 1875, the only record for 

 the County. 



Protonotaria citrea. Prothonotary Warbler. 



Rare ; but one record for the County, a specimen taken 

 between Palmer Lake and Monument, May or June, 1900, by 

 B. G. Voigt, and recorded by Felger, Auk, XXIV, July, 1907, 

 p. 342. Aiken has visited the locality indicated and found an 

 extensive willow thicket flooded by beaver dams, producing 

 quite suitable conditions for this species. 



Vermivora virginiae. Virginia's Warbler. 



Summer resident ; common. Arrives in May, earliest date 

 May 2, 1872; most numerous about the 15th. Departs the last 

 of August and early in September. At Palmer Lake, Septem- 

 ber 6, 1909, Wetmore took three and saw others. 



A bird of the foothills, ranging in the breeding season 

 to about 8,000 feet. In migration, especially in spring, it is 



