Olivaceous of upper parts like _ustulatus_. Reddish of
upper tail-coverts invading lower part of rump; no marked
difference in tint between the tail and its upper coverts.
Flanks and tibiæ yellowish olive-brown; a faint tinge of
buff across the breast. Eggs plain. Wing, 3.80; tail, 3.00;
culmen, .70; tarsus, 1.20. _Hab._ Eastern Province of
United States (only?) … var. _pallasi_.
Olivaceous of upper parts like _swainsoni_. Reddish of tail
not invading the rump, and the tail decidedly more
castaneous than the upper coverts. Beneath almost pure
white; scarcely any buff tinge on breast; flanks and tibiæ
grayish or plumbeous olive. Size smaller than _swainsoni_;
bill depressed. Wing, 3.50; tail, 2.60; culmen, .60;
tarsus, 1.15. _Hab._ Western Province of North America,
from Kodiak to Cape St. Lucas. East to East Humboldt
Mountains … var. _nanus_.
Olivaceous above, like preceding; the upper tail-coverts
scarcely different from the back. Tail yellowish-rufous.
Beneath like _nanus_. Size larger than _swainsoni_. Wing,
4.20; tail, 3.35; culmen, .80; tarsus, 1.30. _Hab._ Rocky
Mountains. From Fort Bridger, south (in winter) to Southern
Mexico … var. _auduboni_.
Turdus mustelinus, GMELIN.