OLD CROW 229 



They appear in lower brush than waterthrushes and less commonly 

 over standing marshy water. The female specimen taken on June 7 

 indicated first laying about June 4. A Wilson's warbler was seen in 

 the 4-foot high willow brush along a small stream valley between the 

 second and third of the Old Crow Mountains, above tree line and at 

 an elevation of about 2,000 feet. 



I have found W. p. pileolafa the form occurring along the head- 

 waters of streams flowing northward through the arctic tundra in 

 Alaska. This, together with Bailey's (1948) reports on their occur- 

 rence in northern Alaska, establishes this species, the smallest in the 

 family, as the most northerly of the wood warblers. 



On June 20 Sidney Peyton found six newly hatched young in a nest 

 well hidden in the moss at the bottom of a small bank. The first egg 

 was probably laid about June 4. On June 21 snow began to fall, and, 

 on the next day it was 6 inches deep. On June 24 all the young were 

 found dead. 



Three of the specimens trend a little in coloration from the darker 

 backs of jmsilla toward the lighter pileolata but all match jmsilla 

 in color of underparts. It appears that the specimens are variants 

 among pusilla rather than intergradations with pileolata. On this 

 basis they are extensions westward of an eastern population. Porsild 

 (1943) had reported pileolata from the Mackenzie Delta, and Rand 

 (1946) attributed Eoss' (1862), Lapierre House record to pileolata. 

 In southern Yukon pileolata has been commonly recorded. Our 

 specimens probably indicate that the eastern form extends westward 

 through the Porcupine Valley meeting the Alaskan range of pileo- 

 lata^ which extends along the Yukon River. This extension of 

 pitsilla westward is north of the range attributed to pileolata in 

 southern Yukon and northwestern British Columbia. 



Family ICTERIDAE: Blackbirds 



Euphagus carolinus carolinus (Miiller) 



Males Females 



Date 



Weight 

 (0.) 



Fat 



Testes 

 (mm.) 



Weight 

 (0.) 



Fat 



Eggs 



May 10 









52.1 



MF 



1. 5 mm. 



May 22 



63.5 



LP 



10x15, 7x10 









June 6 



66.2 



LF 



7x10, 9x8 









June 26 



60.9 



MF 



9x13.5, 12x12.5 



62.9 



MP 



2 mm. 



June 7 













5 half incu- 

 bated eggs 



A female rusty blackbird was collected near the village on May 

 10 by Joe Kay. Until May 17 blackbirds were frequently seen as 

 they were apparently settling in the willow alder brush near by. 

 On May 19 a male was chasing a female and on May 20 some pairs 



