LAGOPUS. 201 
Summer male: Above dark brownish gray, vermiculated and 
coarsely spotted with black, many of the feathers tipped 
with white; chest, upper breast, and sides similar, but 
without the black central blotches to the feathers; head 
and neck more coarsely barred with black, grayish white, 
and pale grayish buff, the lores entirely black; throat, 
wings (except tertials, etc.), belly, and lower breast white; 
under tail-coverts dusky grayish, tipped with white. Sum- 
mer female: More coarsely barred with black and grayish 
white, mixed with buff, the light bars on chest and under 
tail-coverts more ochraceous. Hab. Newfoundland. 
303. L. welchi Brewst. Welch’s Ptarmigan. 
c. Summer males with upper parts very finely and densely vermiculated, 
the back and scapulars usually without black spots or blotches 
(never with these very conspicuous ?). 
da. Summer male: Ground-color of upper parts deep umber-brown; 
chest barred with bright tawny brown and black, the lower 
portion frequently interspersed with uniform blackish feathers. 
Summer female: Not obviously different from the same sex of 
LL. rupestris. Hab. Island of Unalashka, Aleutian chain. 
302. L. rupestris nelsoni Steyn. Nelson’s Ptarmigan. 
a, Summer male: Ground-color of upper parts pale raw-umber brown, 
mixed with pale grayish; chest and neck barred with pale 
brownish ochre and black, the lower portion of the former 
without admixture of dusky feathers. Summer female: 
Ground-color of upper parts ochraceous, mixed with pale 
grayish buff, narrowly and irregularly barred with black 
(but with very little of black spotting), many of the feathers 
tipped with white; sides and flanks similar, but more regularly 
barred, and without traces of spots; chest and neck coarsely 
barred with ochraceous and black. Hab. Island of Atkha, 
Aleutian chain......... 302c. L. rupestris atkhensis (Turner). 
Turner’s Ptarmigan. 
at, Tail white. 
Summer male: Above pale fulvous or dull grayish buff, coarsely ver- 
miculated, barred, and irregularly spotted with black ; chest, upper 
breast, sides, and flanks very heavily spotted (transversely) and 
barred with black on a whitish ground, usually more or less mixed 
with feathers having a pale fulvous ground and more narrowly 
barred with black. Summer female: Similar to male, but usually 
more buffy(?). Fall male: Ground-color of upper parts pale fulvous 
or tawny, mixed with grayish, finely freckled, vermiculated, and 
irregularly barred with black, occasional feathers showing large 
irregular spots of the latter color; middle tail-feathers partly or 
entirely fulvous, finely freckled and vermiculated with dusky ; 
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