_Adult female_ (19,116, Powder River; Captain W. F. Raynolds, U. S. A.). Scarcely different from the male. Above rather paler slaty; the darker shaft-streaks rather more distinct than in the male, although they are not conspicuous. Beneath with the rufous bars rather broader, the dark shaft-streaks less distinct; tibiæ about equally barred with pinkish-rufous and white. Wing, 7.70; tail, 6.90; tarsus, 2.10; middle toe, 1.40. Fourth and fifth quills equal and longest; third equal to sixth; second equal to seventh; first three inches shorter than longest. _Young male_ (41,890, Philadelphia; J. Krider.) Above umber-brown; feathers of the head above edged laterally with dull light ferruginous; those of the back, rump, the upper tail-coverts, scapulars, and wing-coverts bordered with the same; scapulars and rump showing large, partially exposed, roundish spots of pure white. Tail as in adult. Sides of the head and neck strongly streaked, a broad lighter supraoral stripe apparent. Beneath white, with a slight ochraceous tinge; cheeks, throat, and jugulum with fine narrow streaks of dusky-brown; breast, sides, and abdomen with broader longitudinal stripes of clear umber (less slaty than the back), each with a darker shaft-line; on the flanks the stripes are more oval; tibiæ more dingy, markings fainter and somewhat transverse; anal region and lower tail-coverts immaculate white. _Young female_ (12,023, Fort Tejon, California; J. Xantus). Similar in general appearance to the young male. Markings beneath broader, and slightly sagittate in form, becoming more transverse on the flanks; paler and more reddish than in the young male; tibiæ with brownish-rufous prevailing, this in form of broad transverse spots. HAB. Entire continent of North America, south to Panama; Bahamas (but not West Indies, where replaced by _A. fringilloides_, Vig.). Localities: Oaxaca (SCL. 1858, 295); Central America (SCL. Ibis, I, 218); Bahamas (BRYANT, Pr. Bost. Soc. VII, 1859); City of Mexico (SCL. 1864, 178); Texas, San Antonio (DRESSER, Ibis, 1866, 324); Western Arizona (COUES); Mosquito Coast (SCL. & SALV. 1867, 280); Costa Rica (LAWR. IX, 134). LIST OF SPECIMENS EXAMINED. National Museum, 51; Philadelphia Academy, 14; New York Museum, 7; Boston Society, 5; Museum, Cambridge, 9; Cab. G. N. Lawrence, 1; Coll. R. Ridgway, 4; Museum W. S. Brewer, 1. Total, 92. _Measurements._ +----+-----------+-----------+---------+---------+-----------+----------+ |Sex.| Wing. | Tail. | Culmen. | Tarsus. |Middle Toe.|Specimens.| +----+-----------+-----------+---------+---------+-----------+----------+ | ♂ | 6.45–7.00| 5.70–5.90| .40–.00|1.85–1.95| 1.10–1.20| 30 | +----+-----------+-----------+---------+---------+-----------+----------+ | ♀ | 7.50–8.80| 6.90–8.20| .50–.60|2.20–2.25| 1.45–1.55| 40 | +----+-----------+-----------+---------+---------+-----------+----------+