1915 BIRDS OF CALIFORNIA 143 
(Sharp, Condor, 1x, 1907, p. 90). Deciduous trees of riparian growth furnish 
the typical habitat of this bird. Abundant and more generally distributed dur- 
ing migration. 
435 (629a) Lanivireo solitarius cassini (Xantus) 
Cassin VIREO 
Synonyms—Vireo solitarius; Vireo cassim; Vireosylvia solitaria; Vireo sol- 
itarius cassini; Lanivireo solitarius; Lanivireo cassini; Blue-headed Flycatcher. 
Status—Common summer visitant to the Transition zone, more particularly 
along the Sierras; breeds from central San Diego County northward. Rather 
rare in the San Francisco Bay region and humid coast belt; not recorded nearer 
the coast north of Marin County, than Cahto, Mendocino County (McGregor, 
Nidologist, tv, 1896, p. 8). Widely distributed all over the state during migra- 
tion. 
436 (629b) Lanivireo solitarius plumbeus (Coues) 
PLUMBEOUS VIREO 
Synonym—Vireo solitarius plumbeus. 
Status—But one record: adult female taken by H. W. Henshaw in the 
mountains near Fort Tejon, August 1, 1875 (Rep. Wheeler Surv., 1876, p. 236). 
Recent enquiry shows the specimen in question to be probably still extant in the 
National Museum, but it could not at the time be found. Mr. Henshaw is con- 
fident of its identity as above, as careful examination was made by Mr. Ridg- 
way as well as by himself. 
437 (632) Vireo huttoni huttoni Cassin 
Hutton VirEo 
Synonyms—Vireo huttoni obscurus; Vireo huttoni oberholseri; Vireo hut- 
toni mailliardorum; Vireo mailliardorum; Hutton Greenlet; Hutton Flycatcher. 
Status—Common resident in suitable portions of the Upper Sonoran and 
(in the northern part of the state) Transition zones west of the Sierran divide; 
recorded from San Diego and the Cuyamaca Mountains northward, but (except 
for the one instance cited below) only on the Pacific water-shed. Apparently 
breeds wherever found, in other words, there is scarcely any seasonal shifting of 
range, much less migration. Some eastward records are: Witch Creek, San 
Diego County (Bishop, Condor, vu, 1905, p. 142) ; Victorville, one individual, 
probably a stray (J. Mailliard and J. Grinnell, Condor, vm, 1905, p. 101) ; Kern 
River, Kern County (Linton, Condor, x, 1908, p. 181); Big Trees, Calaveras 
County (Belding, Proc. U. 8. Nat. Mus., 1, 1879, p. 410). Northernmost record: 
Siskiyou Mountains (M. P. Anderson and J. Grinnell, Proc. Acad. Nat. Sci. 
Phila., 1903, p. 12). Common on Santa Cruz Island (many records) ; recorded 
once from Santa Catalina Island, one specimen (Belding, Land Bds. Pac. Dist., 
1890, p. 203). 
