{ 
; 
é 
=a 
UNIVERSITY OF CALIFORNIA PUBLICATIONS 
IN 
ZOOLOGY 
Vol. 17, No. 13, pp. 405-422, 1 figure in text February 23, 1918 
THE PACIFIC COAST JAYS OF THE GENUS 
APHELOCOMA 
BY 
H. 8S. SWARTH 
(Contribution from the Museum of Vertebrate Zoology of the University of California) 
The present study is based principally upon the series of Aphelo- 
coma in the Museum of Vertebrate Zoology, including, in addition 
to the specimens contained in the Museum collection, those in the 
Grinnell, Morcom and Swarth collections. Besides this material speci- 
mens were borrowed from other institutions and from individuals, as 
follows: From the Biological Survey, Washington, twelve skins from 
the San Pedro Martir Mountains, Lower California: from the Museum 
of Comparative Zoology, thirteen from the Cape San Lueas region, 
and two from northern Lower California; from the Museum of His- 
tory, Science and Art, Los Angeles, four specimens from southern 
California ; from the collection of the Oregon Fish and Game Commis- 
sion, five specimens from Oregon; from the collection of J. and J. W. 
Mailliard, seventeen specimens, mostly from Marin County, Cali- 
fornia ; from the collection of J. E. Thayer, twenty-five specimens from 
Lower California. The skins borrowed from outside sources are all in 
one way or another illustrative of points not covered by the collection 
of the Museum of Vertebrate Zoology, and the privilege of utilizing 
them added much to the value of the comparisons made. The writer 
wishes here to express his appreciation of, and thanks for, these gen- 
erous loans. Altogether 437 specimens of Aphelocoma were examined. 
Under each form, in the section giving “‘ distinguishing characters,’ 
I have entered an exact statement of the color of a selected specimen, 
an average example of the race in fresh fall plumage. Color terms 
used are from Ridgway’s Color Standards and Color Nomenclature 
(1912). 
