_Young male_ (Fort Tejon, California). Forehead, crown, occiput, and nape deep rusty-rufous; feathers with broad longitudinal streaks of pure black. Rest of upper parts deep umber, darkest on the back; feathers of back and rump, the upper tail-coverts, scapulars, and wing-coverts, broadly bordered with rusty; scapulars with concealed white spots. Tail ashy-umber, tipped (more broadly than in adult) with ashy-white, crossed by four broad bands of brownish-black; the last (or subterminal) of which is broadest, the first concealed by the coverts. Secondaries and primaries similar in color to the tail, but darker; the first showing five obsolete darker bands, and tipped (rather broadly) with pale cinnamon-rufous. Ear-coverts and cheeks fulvous-white, thickly streaked with dark brown. Lower parts white, washed with ochraceous on jugulum and breast; each feather with a central longitudinal lanceolate stripe of clear umber, the shaft of each black; these streaks are very narrow on the throat, broadest on the breast and flanks. Tibiæ with transversely ovate spots, and transverse bars of reddish-umber; lower tail-coverts with narrow shaft-streaks of darker brown. Lining of wing with cordate and ovate spots of dark brown. _Young female_ (42,136, Orizaba, Mexico; M. Botteri). Similar to the young male; feathers of back, etc., less broadly margined with rusty. Ochraceous wash on lower parts more decided; stripes beneath broader and less lanceolate; on the sides broadly ovate, and on the flanks in form of broad transverse bars; tibiæ more thickly spotted transversely; lower tail-coverts immaculate. Wing, 9.00; tail, 7.80; tarsus, 2.25; middle toe, 2.50. Fourth quill longest; third shorter than fifth; second intermediate between sixth and seventh; first, 2.90 shorter than longest. Graduation of tail, .90. HAB. Western region of North America; Mexico. LIST OF SPECIMENS EXAMINED. National Museum, 22; Boston Society, 2; Museum, Cambridge, 2; Cab. G. N. Lawrence, 2; Philadelphia Academy, 2; Coll. R. Ridgway, 2. Total, 32. _Measurements._ +----+-----------+-----------+---------+---------+-----------+----------+ |Sex.| Wing. | Tail. | Culmen. | Tarsus. |Middle Toe.|Specimens.| +----+-----------+-----------+---------+---------+-----------+----------+ | ♂ | 8.50–9.85| 7.50–9.20| .60–.70|2.10–2.75| 1.30–1.65| 24 | +----+-----------+-----------+---------+---------+-----------+----------+ | ♀ |10.20–10.60| 9.30–10.50| .70–.75|2.65–2.75| 1.65–1.75| 4 | +----+-----------+-----------+---------+---------+-----------+----------+