198 GRAY-CROWNED PURPLE FINCH
|This species, which in form and proportion is allied to
Erythrospiza purpurea on the one hand, and to E. cannabina on the other,
is of extremely rare occurrence, a single specimen only being mentioned
as having been obtained by Dr. RICHARDSON on the Saskatchewan, in May
1827, from which my figure was taken.
Male, 6; wing, 4.
Saskatchewan river. Very rare. Migratory.
LINARIA (LEUCOSTICTE) TEPHROCOTIS, Swainson's Grey-crowned Linnet, Swains. and Rich. F. Bor. Amer., vol. ii. p. 265.
GREY-CROWNED LINNET, Fringilla tephrocotis, Aud. Orn. Biog., vol. v.p. 232.
Bill short, thick, conical, its upper and lower outlines straight, the ridge and sides convex, the edges inflected, the gap-line slightly arched, but at the base a little deflected. Nostrils basal, round, concealed by short bristly feathers.
Head rather large, broadly ovate; neck short; body moderate. Feet of moderate length; tarsus of the same length as the middle toe and claw, compressed, anteriorly scutellate, with two lateral plates meeting behind so as to form a sharp edge; hind toe stout, lateral toes nearly equal. Claws rather long, arched, compressed, acute, that of the hind toe largest.
Plumage soft and blended. Wings long, pointed; the second quill longest, the first slightly shorter, the rest rapidly graduated; secondaries rounded. Tail of moderate length, emarginate, the middle-feathers a quarter of an inch shorter than the longest.
Bill black; tarsi and claws dusky brown. The general colour of the plumage is dark umber-brown; the feathers margining the bill whitish; the upper part of the head ash-grey, spotted with black anteriorly; the first row of smaller wing-coverts, the feathers of the rump and the upper tail-coverts are broadly edged and tipped with rose-red, as are the feathers of the sides and the lower tail-coverts, of which however the tint is paler. The quills, larger coverts, and tail-feathers, are dusky brown; the primary and secondary coverts edged with dull red, the quills and tail-feathers with brownish-white.
Length to end of tail 6 inches; bill along the ridge (5 1/2)/12, along the edge of lower mandible (6 1/4)/12; wing from flexure 4; tail 2 7/12; tarsus (8 1/2)/12; hind toe 4/12, its claw 3/12; middle toe 6/12, its claw (2 1/2)/12.