Ixii INTRODUCTION 



Piranga ludoviciana : Western Tanag-er. — Common summer visitant on 



the mountains ; common migrant on the mesas. 

 Progne subis hesperia : Western Martin. — Fairly common summer visitant 



to the mountains. 

 Petrochelidon lunifrons: Cliff Swallow. — Abundant migrant and summer 



visitant to the valley. 

 Hirundo erythrogastra : Barn Swallow — Fairly common migrant through 



the valley. 

 Tachycineta bicolor : Tree Swallow. — Common resident of the lowlands, a 



few wintering. 

 Tachycineta thalassina lepida : Northern Violet-green Swallow. — Common 



summer visitant to the mountains ; abundant migrant through the valley. 

 Stelgidopteryx serrijjenms : Rough-winged Swallow. — Fairly common sum- 

 mer visitant to the mesas. 

 Ampelis cedrorum: Cedar Waxwing. — Common winter visitant to the 



valley. 

 Phainopepla nitens : Phainopepla. — Common summer visitant to the 



mesas. 

 Lanius ludovicianus gamheli : California Shrike. — Common resident of the 



valley. 

 Vireo gilvus swainsoni : '^ Western Warbling Vireo. — Abundant migrant 



through the valley ; fairly common summer visitant locally. 

 Vireo solitarius cassinii : Cassin Vireo. — Common summer visitant in the 



mountain canyons. 

 Vireo huttoni : Hutton Vireo. — Fairly common resident of the oak 



regions. 

 Vireo 2)us{llus : Least Vireo. — Common summer visitant to the valley. 

 Helminthophila ruhricapilla gutturalis : Calaveras Warbler. — Faii'ly com- 

 mon migrant through the valley. 

 Helminthophila celata lutescens : Lutescent Warbler. — Common migrant 



through the valley ; rare summer visitant to the foothills and canyons. 

 Helminthophila celata sordida : Dusky Warbler. — Common fall visitant to 



the valley and foothills. 

 Dendroica cestiva morcomi : ^ Western Yellow Warbler. — Common sum- 

 mer visitant to the willow bottoms and mountain canyons. 

 Dendroica coronata : Myrtle Warbler. — Rare midwinter visitant to the 



valley. 

 Dendroica auduhoni : Audubon Warbler. — Abundant winter visitant 



everywhere. 

 Dendroica nigrescens : Black-throated Gray Warbler. — Common summer 



visitant to the mountains ; migrant through the valley. 

 Dendroica townsendi : Townsend Warbler. — Fairly common migrant over 



the mesas and foothills. 

 Dendroica occidentalis : Hermit Warbler. — Fairly common migrant along 



the foothills and mesas. 

 Geothlypis tolmiei : Tolmie Warbler. — Fairly common migrant along the 



foothills. 

 Geothlypis trichas arizela: Pacific Yellow-throat. — Common resident of 



the lowlands and migrant along the foothills. 

 Geothlyjns trichas scirpicola : ^ Tule Yellow-throat. — Common resident of 



the lowlands. 

 Icteria virens longicauda: Long-tailed Chat. Fairly common summer 



visitant to the willow bottoms. 



1 Vireo gilvus of Check-List. (F. M. B.) 



2 B. sestiva of Check-List. (F. M. B.) 



3 Not yet acted on by A. O. U. committee. (F. M. B.) 



