358 University of California Publications im Zoology [Vol. 24 



races whose habitat they approach so nearly. There is hardly a trace 

 in any specimen of the obscure dorsal streaking seen in altivagans 

 from more southern and eastern stations. The Kispiox Valley 

 migrants are even more questionably referred to altivagans than the 

 Nine-mile Mountain specimens. Our collecting station in that valley 

 was northwest of Nine-mile Mountain. Migrating fox sparrows col- 

 lected there must have traveled from someM'here still farther north, 

 possibly from some region even nearer the coast. These migrating 

 birds in appearance are not unlike some specimens of sinuosa. They 

 differ in shape of bill and in darker, less reddish, coloration, especially 

 dorsally. T believe that they are unquestionably intergrades between 

 altivagans and the nearby coastal subspecies, fxdiginosa. When such 

 birds are taken far to the southward, in the winter habitat, it is 

 admittedly difficult to recognize their true relationships (though similar 

 specimens passing throiigh my hands have been hesitatingly labeled 

 altivagans) , biTt in this case the place of capture affords a valuable 

 clew. No undoubted specimens of simiosa have been found migrating 

 anywhere in the interior of Alaska or British Columbia. 



Piranga ludoviciana (Wilson). Western Tanager 



Eather uncommon summer visitant in the lowlands. First noted 

 near Hazelton on June 3, when two M'ere seen ond others heard calling. 

 Not more than ten or twelve, ail told, seen during the summer, the 

 latest on August 30. Four specimens collected (nos. 42433-42430), 

 an adult male, and three immature nriales. 



Hirundo erythrogsfeter Boddaert. Barn Swallow 



A few pairs were nesting in buildings in Hazelton. Elsewhere, an 

 occasional bird passing overhead -was all that was seen. First noted 

 on June 1. On July 20 small flocks were observed flying southward, 

 apparently migrating. 



Iridoprocne bicolor (Vieillot). Tree Swallow 



Abundant in the lowlands, and already nesting when we reached 

 Hazelton, May 26. Seen entering crevices in buildings in the town, 

 and old woodpecker holes in trees elsewhere. Apparently migrates 

 south at an early date for none was seen after our descent from the 

 mountains, August 14. One specimen collected, an adult male (no. 

 42437). 



