

CONTENTS 



PAGE 



1. Two new Owls from Arizona, with Description of tlie Juvenal 



Plumage of Strix occidentalis occidentalis (Xantus), by 



Harry S. Swarth 1-8 



2. Birds and Mammals of the 1909 Alexander Alaska Expedi- 



tion, by Harry S. Swarth. With 6 plates and 3 figures in 



text 9-172 



3. An apparent Hybrid in the Genus Dendroica, by Walter P. 



Taylor 173-177 



4. The Linnet of the Hawaiian Islands, a Problem in Speciation, 



by Joseph Grinnell 179-195 



5. The Modesto Song Sparrow, by Joseph Grinnell 197-199 



6. Two new Species of Marmots from Northwestern America, 



by Harry S. Swarth 201-204 



7. Mammals of the Alexander Nevada Expedition of 1909, by 



Walter P. Taylor. With 2 figures in text 205-307 



8. Description of a new Spotted Towhee from the Great Basin, 



by Joseph Grinnell 309-311 



9. Description of a new Hairy Woodpecker from Southeastern 



Alaska, by Harry S. Swarth 313-318 



10. Field Notes on Amphibians, Reptiles, and Birds of Northern 

 Humboldt County, Nevada, by Walter P. Taylor. With 6 

 plates 319-436 



Index 437-446 



