Canachites canadensis. Undescribed First Plumages, Brewster 115. Tetrao canadensis. Downy stage: chick about a week old. General ground-color buff-yellow. Central area of crown bright rufous, with a marginal lining of black. A spot of black on the forehead and on each lore, with three nearly confluent ones over the auriculars. Rump yellowish-rufous. Back and wings fulvous, the primaries, secondaries, wing-coverts, and scapulars barred with brownish-black. Under parts immaculate. From a specimen in my collection obtained with the female parent at Upton, Me., June, 1873. First plumage: female. Ground-color above bright reddish-brown, becoming reddish-chestnut on the crown. The feathers are marked everywhere with black blotches of angular outlines and irregular shapes. Upon the neck and rump they form transverse bars: they are broadest and most conspicuous on the scapulars, where they restrict the ground-color to a narrow central lining along the shaft of the feathers, and a few irregular outlying spots. Primaries and secondaries edged and tipped with pale fulvous. Tail crossed by eight distinct, continuous black bars. Auriculars spotted with dusky black. Throat and a broad superciliary line pale buff. (It should be stated that these parts are covered with what seems to be the still unchanged feathering of the chick.) Breast and sides bright rufous-orange, each feather with a pair of black spots on the outer webs. Upon the breast these spots are small and nearly round, but along the sides they become broader until about the anal region they form transverse bars. Central, abdominal, and anal regions immaculate buffy-white. From a specimen in my collection obtained at Upton, Me., July 28, 1874. Among the series of young males before me there are none in strictly first plumage. The moult begins early in August and proceeds very gradually, a few of the feathers dropping out at a time, as they are replaced by the more permanent fall plumage. The wing and tail feathers are invariably moulted; thus through the last half of August and nearly the whole of September the plumage presents a curiously patched appearance. In this condition the young male may be distinguished from the female by the black feathers which begin to appear in patches on the breast. The sexes are otherwise quite similar at this age. In both, the throat, cheeks, and sides of the neck are profusely but rather finely spotted with black upon a yellowish—in some examples ashy—white ground. This is unquestionably a remnant of the first plumage, which in the young female previously described had not replaced the down. The feathers upon the throat and crown are apparently the last to go, as they are not replaced in any of the specimens before me until the succeeding plumage is nearly complete. Both sexes acquire their full plumage during October, and by the latter part of that month, adults of either sex can only be distinguished with the greatest difficulty from birds of the year. Bull. N.O.C. 4, Jan., 1879, p. 43-44.