1918] Swarth: The Pacific Coast Jays of the Genus Aphelocoma 415 
the neighboring race of the nearby Sacramento Valley. There is a 
series of Aphelocoma at hand from that portion of Sonoma County 
wherein, as deseribed by J. Mailliard (1908, p. 133), there oceurs a 
form of Cyanocitta closely approaching the interior form frontalis 
rather than the coastal race carbonacea. In the Aphelocoma of this 
strip of country it is again of interest to note that in birds taken at 
points extending practically to the coast, coloration is appreciably 
paler than in typical oocleptica, closely approaching that seen in 
Sacramento Valley immanis. 
In the region immediately west of San Francisco Bay, birds from 
the vicinity of Berkeley and Oakland exhibit the extreme of large 
size and dark coloration. Just a few miles away, however, on the 
farther slope of the hills to the westward of these points, the jays 
exhibit a pronounced leaning toward immanis. <A series of five birds 
taken at a point in this region (near Danville, Contra Costa County), 
and in fresh fall plumage, are noticeably pale colored, strikingly 
similar to specimens from the Sierra Nevada. I include this region 
in the range of oocleptica, however, partly because of the slightly 
darker tone of coloration of adult birds from this section (as com- 
pared with Sierran immanis), and largely because in the juvenal 
plumage (as exhibited in specimens from Mount Diablo and Walnut 
Creek) there is no variation from the corresponding stage as it occurs 
in Marin County. In typical immanis the juvenal plumage is as 
conspicuously different from oocleptica as is the adult. 
Aphelocoma californica immanis Grinnell 
Type locality.—Scio, Linn County, Oregon. 
Range.—Extreme southern Washington, in Oregon those valleys lying between 
the Cascades and the Coast Ranges, and south in California through the Sac- 
ramento and San Joaquin valleys and the Sierra Nevada. East to the Warner 
Mountains and the eastern base of the Sierra Nevada. 
Specimens examined from the following localities: 
Oregon: Linn County—Scio, 4. Benton County—Corvallis, 1. Multnomah 
County—Portland, 2. Josephine County—Grant’s Pass, 1. Jackson County— 
Gold Hill, 2. Douglas County—Roseburg, 1. ‘‘ Willamette Valley,’’ 1. 
California: Modoe County—Warner Mountains, 38. Trinity County—Helena, 
1. Shasta County—Baird, 1. Nevada County—Independence Lake, 1; Little 
Truckee River, 1. Placer County—Cisco, 1. Inyo County—Kearsarge Pass, 2; 
Carroll Creek, 1. Kern County—Onyx, 1; Walker Pass, 1; Fay Creek, 5; Bod- 
fish, 2; Piute Mountains, 4; Caliente, 1. Tulare County—Taylor Meadow, 4; 
Trout Creek, 4; Cannell Meadow, 2. Fresno County—Dunlap, 4; Minkler, 14. 
Madera County—Raymond, 1. Mariposa County—El Portal, 7; Coulterville, 2. 
Merced County—Snelling, 2. Stanislaus County—La Grange, 1; Modesto, 3. 
