1887. ] PKOCEEDINGS UF UNi f ED .-STATES NATIONAL MUSEUM. 435 

 Phrygilus atriceps (D'Orb. & Lafr.'). 



Emheriza atriceps D'Orb. & Lafr., Mag. deZool., 1837 (Synopsis Avium), 76 (Tacora, 

 hi-hlauds of Peru)— D'Okb., Voy. Ame'r. M^rid., Ois., 1839, 363 pi 47' 

 fig. 2. ' • ' 



Fhrygihis atriceps Tscn., Faim. Per., 1844-'46, 218.— Bonap., Cousp., i, 1850, 477.— 

 SCL. & Salv., Norn. Neotr., 1873, 31 ; P. Z. S., 1876, 16 (Paucartambo)!- 

 Taczax., Om. Per., iii, 1886, 34 (Southern Peru). 



Habitat.— Higlilands of Southern Peru and Bolivia. 

 Sp. Char.— Head, neck, and chest uniform black or dusky slate, very 

 abruptly contrasted with the bright chestnut-tawny of the back and 

 gallstone yellow of the breast; rump and lower back gallstone yellow. 

 Adult male (type, iTo. 6533, Lafresnaye Collection, Mus. Boston Soc. 

 :N'at. Hist.): Head, upper half of hinder part and sides of neck and 

 entire fore neck down to and including upper chest uniform dull slate- 

 black, with a very regular and sharply defined posterior margin ; back, 

 innermost scapulars and lower hind neck bright chestnut- tawny, tinged 

 especially beneath the surface, with gallstone yellow ; exterior scapu- 

 lars dull gray, tinged with olive-yellowish ; lower back, rump, breast, 

 and sides uniform deep gallstone yellow, the sides and Hanks tinged 

 with tawiiy; belly lighter and purer yellow, inclining to gamboge,- 

 lower tail-coverts white, with much of their concealed portion slate- 

 gray; anterior lesser ^^ing-co verts yellowish olive-green; rest of wing 

 coverts uniform slate-gray or deep ash-gray ; remiges, alula, and tail 

 feathers black, edged with deep ash-gray (more hoary on primaries and 

 rectrices). Upper mandible dusky brownish, paler terminally (appar- 

 ently blackish in life). Length (of mounted specimen), about 6.00 ; wing, 

 3.85 ; tail, 2.70 ; exposed culmeu, .60 ; depth of bill at base, .33 ; tarsusj 

 1.05 ; middle toe, .70. 



The following synoptical table will facilitate the determination of 

 specimens : 



a'. Larger (wing more than 3.50, exposed cnlmen .60 or more). 

 • ¥. Head, neck, and chest black ; back chestnut-tawny, rump gallstone-yellow. 



^aftifa*.- Highlands of Peru and Bolivia 1. P. atriceps (D'Orb. & Lafr.). 



h". Head, neck, and chest slate-gray, bordered posteriorly by an olive-green collar 

 (this indistinct in female); back russet (male) or olive (female), rump olive- 

 yellow (male) or olive-green (female). Rahitat.—l.nke Titicaca basin, Peru and 



Bolivia 2. P. puneiisis Ridgw. 



«^ Smaller (wing notmore than 3.50, exposed culmen not more than .50. 



iK Upper mandible blackish; back olive-green, the rump brighter, more yellowish • 

 head, neck, wings, &c., deep ash-gray, or plumbeous in adult male (much duL 

 ler gray, the pileum streaked with dusky in female). Rabitat.— Chili ; South- 

 ern Peru; Southern Patagonia? 8. p. ^fl,/j (Eyd. & Gerv.) 



i\ Upper mandible light colored ("bluish horn-color" in life) like lower ; back 

 bright russet or orange-chestnut (male) or olive-russet (female), in marked con- 

 trast with bright gallstone-yellow or olive-yellow of rump ; head, neck, wings, 

 &c., deep bluish plumbeous (male) or plumbeous-gray (female). Hahitat.— 

 Straits of Magellan (Tierra del Fuego and Southern Patagonia. 



4. P. formosus (Gould). 



