58 NORTH AMERICAN FAUNA. 
[No. 16. 
BIRDS OF TRANSITION ZONE-—-continued, 
(1) Species known to occur in Transition zone of Shasta—Continued. 
Selasphorus rufus. 
Sialia mexicana ovcidentalis. 
Sitta carolinensis aculeata. 
Sitta pygmma, 
Speotyto cunicularia hypogea. 
Sphyrapicus ruber. 
Spizella socialis arizone. 
Stellula calliope. 
Sturnella magna neglecta. 
Tachycineta bicolor. 
Tachycineta thalassina. 
Thryomanes bewicki spilurus. 
Troglodytes aédon parkmani. 
Tyrannus verticalis. 
Vireo gilvus swaiusoni. 
Vireo solitarius cassini. 
?Wilsonia pusilla pileolata. 
Xenopicus albolarvatus. 
Zamelodia melanocephala, 
Zevaidura macroura, 
(2) Restricted to Transition zone. 
?Chatura vauxi. 
Contopus richardsoni. 
Dryobates pubescens gairdneri. 
Glaucidium gnoma calitornicum. 
Melanerpes torquatus. 
Oreospiza chlorura. 
Passerella iliaca megarhyncha. 
Sialia mexicana occidentalis. ! 
Sitta pygmiea, 
Sphyrapicus ruber. 
Vireo solitarius cassini. 
Zamelodia melanocephala. ! 
(3) Common to Transition and Upper Sonoran zones. 
[See p. 54.] 
(4) Common to Transition and Canadian zones. 
Aquila chrysaitos. 
Bubo virginianus. 
Buteo borealis calurus. 
Ceophleus pileatus abieticola. 
Certhia familiaris occidentalis. 
Chordeiles virginianus. 
Colaptes cafer. 
Contopus borealis. 
Cyanocitta stelleri. 
Dendragapus obsrurus fuliginosus. 
Dendroica auduboni. 
Dryobates villosus hyloscopus. 
Empidonax difficilis. 
Empidonax hammondi. 
Empidonax wrighti. 
Falco sparverius. 
Geothlypis tolmiei. 
Helminthophila celata lutescens. 
Helminthophila rubricapilla eutturalis. 
Hylocichla aonalaschke auduboni. 
Melospiza lincolni. 
Merula migratoria propinyua. 
Oreortyx pictus plumiferus. 
Piranga ludoviciana. 
Sclasphorus rufus, 
Sitta carolinensis aculeata. 
Stellula calliope. 
Wilsonia pusilla pileolata. 
Xenopicus albolarvatus. 
PLANTS OF TRANSITION ZONE, 
(1) Species known to vecur in the Transition zone of Shasta, 
Abies concolor lowiana. 
Acer circinatum. 
Acer glabrum. 
Acer macrophyllum. 
Achillea lanulosa. 
Alnus tenuifolia. 
Amelanchier alnifolia. 
Anaphalis margaritacea. 
Antennaria geyeri. 
Apocy num pumilum. 
Aquilegia truncata. 
Arctostaphylos patula. 
Artemisia ludoviciana. 
Artemisia trideutata. 
Asarum hartwegi. 
Betula occidentalis. 
' Probably common to Transition and Upper Sonoran. 
