2. P. æstivalis. Above uniformly marked with broad streaks or longitudinal blotches of deep rufous; black streaks confined to interscapulars and crown. Tail-feathers without darker shaft-stripe, and without indications of darker bars; the outer feathers without distinct white. Black marks on upper tail-coverts inconspicuous, longitudinal.
The bluish-ash, and chestnut-rufous streaks above sharply contrasted; black dorsal streaks broad. Wing, 2.45; tail, 2.65; bill, .30 and .30; tarsus, .73; middle toe, .60. Hab. Southern States from Florida and Georgia to Southern Illinois … var. æstivalis.
The dull ash and light rufous streaks above not sharply defined; black dorsal streaks narrow. Wing, 2.65; tail, 3.00; bill, .32 and .25; tarsus, .80; middle toe, .63. Hab. Southern border of the Arizona region of Middle Province of United States … var. arizonæ.
Markings badly defined as in the last, but the rufous streaks darker (in summer plumage almost entirely black), with more black on the crown. Wing, 2.55; tail, 2.65; bill, .32 and .25; tarsus, .80; middle toe, .60. Hab. Mexico (Orizaba; Mirador, Colima) … var. botterii.[8]
3. P. cassini. Above marked everywhere with broad short streaks of pale (not reddish) brown streaks, all black medially. Tail-feathers with
distinct blackish shaft-stripe, throwing off narrow, obsolete bars toward the edge of the feathers. Outer tail-feathers distinctly tipped (broadly) and edged with dull white. Black marks on upper tail-coverts very large, transverse. Beneath nearly uniform dull white, scarcely darker along sides and across breast; flanks with broad streaks of blackish-brown. Wing, 2.55; tail, 2.80; bill, .28 and .23; tarsus, .68; middle toe, .55. Hab. Rio Grande, region (San Antonio and Laredo), north to Kansas (Allen).
Peucæa æstivalis, Cabanis.
BACHMAN’S SPARROW.
Fringilla æstivalis, Licht. Verz. Doubl. 1823, 25, No. 254.—Bonap. Conspectus, 1850, 481. Peucæa æstivalis, Cabanis, Mus. Hein. 1850, 132.—Baird, Birds N. Am. 1858, 484. Fringilla bachmani, Aud. Orn. Biog. II, 1834, 366, pl. clxv. Ammodromus bachmani, Bon. List, 1838. Peucæa bachmani, Aud. Syn. 1839.—Ib. Birds Am. III, 1841, 113, pl. clxxvi.—Bon. Consp. 1850, 481 (type). Fringilla æstiva, Nutt. I, (2d ed.,) 1840, 568. “Summer finch, Latham, Synopsis, (2d ed.,) VI, 136.” Nuttall.
