ocT., 1899.} BOREAL SPECIES OF SHASTA AND SIERRA-CASCADKES. 73 
zones, 46 percent; of species restricted to the Hudsonian and Alpine 
zones, 44 percent. 
For evidence of another kind—that based on the absence from Shasta 
of species which occur in the Sierra or the Cascades or both—see pages 
79-82, 
Following are the tables on which the foregoing generalizations are 
based : 
(1) BOREAL SPECTES COMMON TO SHASTA AND THE SIERRA-CASCADE 
SYSTEM. 
(Species followed by the letter T range down into or through the Transition zone.) 
(4) MAMMALS, 
Callospermophilus chrysodeirus ‘I’. Myotis yumanensis saturatus, 
Canis lestes. Neotoma cinerea T. 
Erethizon epixanthus T. ? Neurotrichus gibbsi major T. 
Eutamias amcenus T. Ochotona schisticeps. 
Eutamias senex T. Odocoileus columbianus T. 
Evotomys mazama.' Peromyscus gambeli T. 
Felis oregonensis T. Phenacomys orophilus. 
Lepus klamathensis T.? Putorius arizonensis. 
Lutreola vison energuimenos T. Sorex vagrans amcenus T. 
Microtus mordax T. Sorex (Neosorex) navigator. 
Mustela caurina, Taxidea taxus T. 
Mustela pennanti. Ursus americanus T. 
Myotis lucifugus longicrus T. Vulpes macrourus T. 
(b) BIRDS. 
Accipiter atricapillus striatulus. Hylocichla aonalaschke auduboni T. 
Accipiter velox. Melospiza lincolni T. 
Aquila chrysaitos T. Mernla migratoria propingua T. 
Carpodacus cassini. Myadestes townsendi. 
Ceophleus pileatus abieticola T. Nucifraga columbiana. 
Certhia familiaris occidentalis T. Oreortyx pictus plumiferus T, 
Cinclus mexicanus T.? Parus gambeli. 
Coccothraustes vespertinus montanus. Picoides arcticus. 
Colaptes cafer T. Piranga ludoviciana T. 
Contopus borealis T. Regulus calendula. 
Dendragapus obscurus frliginosns T. Regulus satrapa olivaceus, 
Dendroica auduboni T. Salpinctes obsoletus T. 
Dendroica occidentalis. Selasphorus rufus T. 
Dryobates villosus hyloscopus T. Sialia arctica. 
Empidonax difficilis T. Sitta canadensis. 
Empidonax hammondi T. Sitta carolinensis aculeata T. 
Empidonax wrighti T. Sphyrapicus thyroideus. 
Geothlypis tolmiei T. Spinus pinus. 
Helminthophila celata lutescens T. Stellula calliope T. ~ 
Helminthophila rubricapilla guttur-  Wilsonia pusiila pileolata T. ? 
alis T. Zonotrichia leucophrys. 
| Evotomys mazama, a2 common Cascade species, was obtained by us on Shasta and 
Lassen, and doubtless occurs in the Sierra, farther south. 
21753—No. 16 10 
