138 SUMMER HOME OF DENDRGCA C@RULESCENS. 
These birds are a local race,* breeding from one generation 
to another. They arrive from the South nearly ten days 
earlier than those that pass through the valleys on their 
northward migration. It is common to observe migrants 
through the valleys while breeders on the higher mountains 
are already nest-building and rearing their young. 
*As this subspecies does not appear to have been named, it may be 
called Dendreca caerulescens cairnsi—E.C. 
