ocr, 1899.] TRANSITION ZONE. 57 
MAMMALS OF TRANSITION ZONE—conutinued, 
(2) Restricted to Transition zone. 
Bassariscus astutus raptor. *Microtus montanus, 
Lynx fasciatus pallescens. Sciurus fossor, 
?Mephitis occidentalis. Urocyon californicus townsendi. 
(3) Common to Transition and Upper Sonoran zones. 
[See p. 54.] 
(4) Common to Transition and Canadian zones, 
Callospermophilus chrysodeirus. Perognathus mollipilosus. 
Cervus occidentalis. Peromyscus boyli. 
Erethizon epixanthus. Peromyscus gambeli. 
Entamias anvwnus. Scapanus californicus. 
Eutamias senex. Sciuropterus alpinus klamathensis? 
Felis oregonensis. Sciurus albolimbatus. 
Lutra hudsonica, Sorex montereyensis. 
Lutreola vison energumenos. Sorex vagrans amonus, 
Microtus mordax, Taxidea taxus, 
Myotis lucifugus longicrus. Ursus americanus. 
Neotoma cinerea. Ursus horribilis. 
Neurotrichus gibbsi major. Vulpes macrourus.! 
Odocoileus columbianus. 
BIRDS OF TRANSITION ZONE, 
(1) Species known to occur in Transition zone of Shasta, 
Aphelocoma californica. Empidonax difiicilis. 
Aguila thrysai‘tos. Empidonax hammondi. 
Astragalinus psaltria. Empidonax wrighti. 
Astragalinus tristis salicamans. Falco sparverius. 
Bubo virginianus. Geothlypis tolmiei. 
Buteo borealis calurus. Geothlypis trichas occidentalis. 
Buteo swainsoni. Glaucidium gnoma californicum, 
Calypte anna. Helminthophila celata lutescens. 
Carpodacus mexicanns obscurns. Helminthophila rubricapilla gutturalis. 
Cathartes aura. Hirundo erythrogastra. 
Ceophleus pileatus abieticola. Hylocichla aonalaschkew auduboni. 
Certhia fanuliaris occidentalis, Icteria virens longicauda. 
Chetura vauxi. Lophortyx californicus vallicola. 
Chondestes grammacus strigatus, Melanerpes formicivorus bairdi. 
Chordeiles virginianus. Melanerpes torquatus. 
Circus hudsonius. Melospiza lincolni. 
Colaptes cafer. Melospiza melodia montana, 
Contopus borealis. Merula migratoria propinqua. 
Contopus richardsoni. Oreortyx pictus plumiferus. 
Cyanocitta stelleri. Oreospiza chlorura. 
Cyanospiza ameena, Passerella iliaca megarhyncha. 
Dendragapus obscurus fuliginosus. Petrochelidon lunifrons. 
Dendroica exstiva. Phalenoptilus nuttalli. 
Dendroica auduboni. Pipilo maculatus megalonyx. 
Dryobates pubescens gairdneri. Piranga Indoviciana. 
Dryobates villosus hyloscopus. Scolecophagus cyanocephalus. 
! Supposed to breed in Canadian and wander over Transition. 
21753—No. 16 8 
