Genus AURIPARUS, Baird.
Auriparus, Baird, Rev. Am. Birds, 1864, 85. (Type, Ægithalus flaviceps, Sund.)
Gen. Char. Form sylvicoline. Bill conical, nearly straight, and very acute; the commissure very slightly and gently curved. Nostrils concealed by decumbent bristles. Wings long, little rounded; the first quill half the second; third, fourth, and fifth quills nearly equal, and longest. Tail slightly graduated. Lateral toes equal, the anterior united at the extreme base. Hind toe small, about equal to the lateral. Tarsus but little longer than the middle toe.
This genus is closely allied to Paroides of Europe, as shown in Birds of North America (p. 399), though sufficiently different. It is much more sylvicoline in appearance than the other American Paridæ.
YELLOW-HEADED BUSH-TITMOUSE; VERDIN.
Ægithalus flaviceps, Sundevall, Ofversigt af Vet. Ak. Förh. VII, v, 1850, 129. Psaltria flaviceps, Scl. P. Z. S. XXIV, March, 1856, 37. Psaltriparus flaviceps, Scl. Catal. Am. Birds, 1861, 13, No. 79. Paroides flaviceps, Baird, Birds N. Am. 1858, 400, pl. liii, fig. 2. Auriparus flaviceps, Baird, Review, 1864, 85.—Cooper, Birds Cal. 1, 51. Conirostrum ornatum, Lawrence, Ann. N. Y. Lyc. May, 1851, 113, pl. v, fig. 1 (Texas).
Sp. Char. Above cinereous; head, all round, yellow; lesser wing-coverts chestnut; beneath brownish-white. Length, 4.50 inches; wing, 2.16; tail, 2.35.
Hab. Valleys of the Rio Grande and Colorado; Cape St. Lucas.
