ye Dwicut, Moult of Quatls and Grouse. 47 
Above grayish brown with dark markings and dull white speck- 
ling, the neck and head clear gray with a little white speckling ; 
crest dull brown with indistinct buff barring. Below gray with 
whitish edgings, chin chiefly white, the flanks and crissum chest- 
nut tinged. Sexes practically alike. Two birds in my collection, 
No. 3895, g, Tacumba Valley, California, July 4, and No. 3896, 
Q, San Gabriel Mts., California, Aug. 4, have assumed a few 
body feathers of the first winter dress. In neither are the two 
distal primaries fully developed while the postjuvenal moult has 
advanced from the tenth to the sixth. The rich brown feathers 
of the winter dress have begun to appear on the flanks, their 
origin being the sides of the breast. 
first Winter Plumage, acquired by a complete postjuvenal 
moult, except the distal pairs of primaries. Birds become practi-. 
cally indistinguishable from adults and the females not very 
different from the males but with duller colors and smaller, 
browner crests. 
first Nuptial Plumage. —'Vhe material exaimined does not 
show whether a prenuptial moult takes place or not. It probably 
does and is limited to the head as in the other Partridges. 
Later plumages are but repetitions of the last two. 
Callipepla squamata (Vzg.). SCALED PARTRIDGE. 
* ‘ castanogastris (Brewst.). CHESTNUT- 
BELLIED SCALED PARTRIDGE. 
I have examined about 150 specimens of these two forms, 
which show the plumages and moults at nearly all stages. 
Fading is more apparent than in any of the Quails. 
Natal Down. — Several specimens have partly assumed the 
juvenal dress but the down of the head and throat indicates a 
brown dress mottled above and whitish below. 
Juvenal Plumage, acquired by a complete postnatal moult. 
Above similar to C. ca/éfornica but paler and more streaked, below 
grayer mottled with dull white. Numerous specimens show the 
change into the next plumage. 
First Winter Plumage, acquired by a complete postjuvenal 
moult, excepting the two outer primaries, as is usual in this 
