112 PROCEEDINGS OF THE ACADEMY OF 



verse bars of blackish-brown, about six on each feather. Tail dark 

 brown like the back, approaching back terminally, basally with a 

 slight hoary cast; crossed by about ten narrow, very obscure bands 

 of nearly black. Front and whole throat clear white, immaculate, 

 and sharply defined against the surrounding blackish ; lores dusky. 

 Whole breast, cinnamon-rufous (forming a wide, sharply defined 

 patch), marked laterally with the brown of the neck ; each feather 

 with a shaft-line of black; rest of lower parts, including whole lining 

 of the wing, continuous ochraceous-white, the latter region unva- 

 riegated ; sides with sparse, faint, transverse bars of rufous, and 

 shaft-lines of darker. Under side of primaries light slate anterior 

 to emargination, beyond which thej^are black; slaty portion crossed 

 by very obscure bars of darker. Fourth quill longest, third scarcely 

 shorter ; second equal to fifth ; first intermediate between seventh 

 and eighth. Length, 19.75 ; extent, 48.00 ; wing, 15.40 ; tail, 8.00; 

 tarsus, 2.32 ; middle toe, 1.60. Weight H lbs. Bill slate-black, 

 bluish basally; cere, and angle of mouth, light dull lemon-yellow ; 

 iris deep hazel ; tarsi and toes deep chrome yellow ; claws black. 



Female (58,507, Great Salt Lake City, Utah, May ; C. King, 

 R. Ridgway): Similar to the male, but pectoral area blackish- 

 brown, like the back ; blackish-brown of upper surface untinged 

 with rufous, all the feathers, however, fading on edges; bands 

 of the tail scarcely distinguishable on outer webs ; white of fore- 

 head very restricted; lining of the wing marked with small cordate 

 or deltoid spots of black; under surface of primaries plain deep 

 slate. Abdomen and sides variegated with a few irregular longi- 

 tudinal spots, and on the latter, transverse bars of dark brown ; 

 tibiae with faint bars of rufous. Fourth quill longest; third 

 scarcely shorter ; second very slightly shorter than fifth ; first in- 

 termediate between seventh and eighth. Length, 21.50 ; extent, 

 54.00; wing, 16.50; tail, 8.50; tarsus, 2.70; middle toe, 1.70. 

 Weight, 2| lbs. 



Young = B. bairdii, Hoy, and B. oxypterus, Cassin (10,761, 

 Rocky Mountains, September ; C. Drexler) : Head, neck, and 

 entire lower parts fine delicate ochraceous, or cream-color ; feathers 

 of the crown, occiput, and neck, each with a medial stripe of black, 

 of less amount, however, than the ochraceous; forehead, super- 

 ciliary region, and ear-coverts, with only a few verj' fine hair-like 

 shaft-streaks; on the chin, and across the cheeks, are longitudinal 

 spaces of blended streaks of black, the latter forming a conspic- 



