Their eggs resemble those of the _T. ædon_ so as to be hardly distinguishable, yet on comparing several sets of each there seem to be these constant differences. The spots of the western species are finer, less marked, more numerous, and of a pinker shade of reddish-brown. The eggs, too, range a little smaller in size, though exhibiting great variations. In one nest the average measurement of its seven eggs is .60 by .50, that of another set of the same number .70 by .50 of an inch. In all respects, habits, manners, and notes, Parkman’s Wren is a perfect counterpart of the eastern House Wren. In the country east of the Sierra Nevada it almost wholly replaces the western Bewick’s Wren (_Thryothorus bewickii_, var. _spilurus_), and inhabits any wooded localities, as little preference being given to the cottonwoods of the river valleys as to the aspen groves high up in the mountains. Troglodytes parvulus, var. hyemalis, VIEILL. WINTER WREN. _Sylvia troglodytes_, WILSON, Am. Orn. I, 1808, 139, pl. viii, f. 6. _Troglodytes hyemalis_, VIEILLOT, Nouv. Dict. XXXIV, 1819, 514.—AUD. Orn. Biog. IV, 1838, 430, pl. ccclx.—IB. Birds Am. II, 1841, 128, pl. cxxi.—BAIRD, Birds N. Am. 1858, 369; Rev. 144.—SCLATER, P. Z. S. 1856, 290 (Cordova, Mex.).—IB. Catal. 1861, 23, no. 152.—DALL & BANNISTER (Alaska).—COOPER, Orn. Cal. I, 1870, 73. SP. CHAR. Bill very straight, slender, and conical; shorter than the head. Tail considerably shorter than the wings, which reach to its middle. Upper parts reddish-brown; becoming brighter to the rump and tail; everywhere, except on the head and upper part of the back, with transverse bars of dusky and of lighter. Scapulars and wing-coverts with spots of white. Beneath pale reddish-brown, barred on the posterior half of the body with dusky and whitish, and spotted with white more anteriorly; outer web of primaries similarly spotted with pale brownish-white. An indistinct pale line over the eye. Length, about 4 inches; wing, 1.66; tail, 1.26. HAB. North America generally. South to Cordova, Mex. Western specimens may be separated as a variety _pacificus_ (BAIRD, Rev. Am. Birds, 1864, 145), based on the much darker colors and the almost entire absence of the whitish spots among the dark bars. The under parts are more rufous; the tarsi are shorter, the claws larger, the bill straighter and more slender.