_b._ Streaks, above and below, not sharply defined, and without black medially. Above rufescent-olive, the darker shades castaneous; streaks beneath castaneous-rufous. Wing, 2.60; tail, 2.50; bill, .35 and .23. _Hab._ Pacific Province from British Columbia, southward var. _guttata_. Above sepia-plumbeous, the darker shades fuliginous-sepia; streaks beneath fuliginous-sepia. Wing, 3.00; tail, 3.00; bill, .41 and .25. _Hab._ Pacific Province from British Columbia northward var. _rufina_. Above plumbeous, the darker markings dull reddish-sepia in winter, clove-brown in summer; streaks beneath castaneous-rufous in winter, dull sepia in summer. Wing, 3.40; tail, 3.60; bill, .50 and .30. _Hab._ Pacific coast of Alaska (Kodiak, etc.) var. _insignis_. 2. M. lincolni. White of the lower parts interrupted by a broad pectoral band of buff; streaks on the jugulum, etc., narrow linear. A vertex and superciliary stripe of ashy; a maxillary one of buff. Wing, 2.60; tail, 2.40; bill, .30 and .25. _Hab._ Whole of North America; south, in winter, to Panama. B. Lower parts without streaks (except in young.) 3. M. palustris. Jugulum and nape tinged with ashy; outer surface of wings bright castaneous, in strong contrast with the olivaceous of the back; dorsal streaks broad, black, without rufous externally; a superciliary and maxillary stripe of ashy. ♂. Crown uniform chestnut, forehead black. ♀. Crown similar, but divided by an indistinct ashy stripe, and more or less streaked with black (autumnal or winter ♂ similar). _Juv._ Head, back, and jugulum streaked with black on a yellowish-white ground; black prevailing on the crown. _Hab._ Eastern Province of North America. [2] _Winter plumage._ Rusty prevailing above, but hoary whitish edges to feathers still in strong contrast; streaks beneath with a rufous suffusion externally, but still with the black in excess. [3] _Winter plumage._ Gray above more olivaceous, the black streaks more subdued by a rufous suffusion; streaks beneath with the rufous predominating, sometimes without any black. [4] _Winter plumage._ Above rusty-olive, with little or no ashy, the black streaks broad and distinct. Streaks beneath with the black and rusty in about equal amount. [5] In summer the streaks beneath are entirely intense black; in winter they have a slight rufous external suffusion. [6] _Melospiza melodia_, var. _mexicana_, RIDGWAY. Mexican Song Sparrow. _? ? Melospiza pectoralis_, VON MÜLLER.