VOL. I.] Distribution of Land Birds. 259 
Pacir1o Coast AREA, CoMMON TO BOTH AREAS. SIERRA NEVADA AREA. 
Oreortyx pictus Oreortyx pictas plumiferus 
Callipepla californica 
Bonasa umbellus sabini- Dendragapus obscurus fuliginosus _ 
Accipiter velox. 
Glaucidium gnoma californicum 
Dryobates villosus harrisii 
Colaptes cafer saturatior Xenopicus albolarvatus 
Colaptes cafer Sphyrapicus ruber 
Chetura vauxii Chordeiles virginianus henryi 
Trochilus calliope 
Contopus borealis 
Empidonax obscurus 
Cyanocitta stelleri 
{ Cyanocitta stelleri frontalis Cyanocitta stelleri frontalis 
Picicorvus columbianus 
Cyanocephalus cyanocephalus 
Agelaius gubernator Agelaius pieniceus 
Carpodacus cassini> 
Zonotrichia leucophrys gambeli Zonotrichia leucophrys 
Melospiza fasciata samuelis Melospiza fasciata heermanni 
Passerella iliaca megarhyncha 
Pipilo maculatus oregonus Pipilo maculatus megalonyx 
Pipilo chlorurus 
Piranga ludoviciana 
Vireo solitarius cassinii 
Helminthophila ruficapilla gutturalis 
Helminthophila celata lutescers 
Dendroica nigrescens : 
Dendroica townsendi Dendroica auduboni 
Dendroica occidentalis 
Geothlypis macgillivrayi 
_ Cinclus mexicanus 
Certhia familiaris occidentalis 
Sitta carolinensis aculeata 
Sitta canadensis 
Sitta pygmea 
Parus rufescens neglectus Parus gambeli 
Regulus satrapa olivaceus 
Myadestes townsendii 
. Merula mnigretoria propingua 
- Turdus ustulatus ; Sialia arctica 
The Sierra Nevada Area, it will be seen, has a much larger num- 
_ ber of characteristic species than the Pacific Coast Area, and is more 
sharply marked as a zoological region. It is in this area that the 
woodpeckers and warblers (Picide and Mniotiltide) attain their 
maximum abundance in the State ; and they here form the two most _ 
_ distinctive families. The following woodpeckers breed in this area, 
: although they are not all characteristic of it: Harris's white-headed, 
arctic three-toed, red-breasted sapsucker, pileated woodpecker, — 
& coselad os and red-shafted flicker. Of the warblers might be men- 
