1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 433 



Sp. Char.— Similar to P. gaiji, but smaller, with upper mandible col- 

 ored like the lower (instead of being- blackish), gray of head, neck 

 wings, &c., much bluer, yellow of under parts richer, and color of backj 

 &c., much browner (bright russet or orange-chestnut in adult male). 



Adult male (IS[o. 48967, Straits of Magellan, 18G4: ; ^at. Mus. Chili) : 

 Head and neck uniform deep grayish blue or bluish plumbeous (becom- 

 ing darker round base of bill and nearly black on lores), bordered 

 posteriorly with a collar of deep olive-green, broadest across hind neck 

 (?) whereabout .30 wide; back bright russet or orange-chestnut, tinged 

 with olive-yellow; scapulars chiefly olive-green; rump bright gallstone- 

 yellow, tinged with olive-green posteriorly. Wing-coverts and upper 

 tail-coverts uniform deep bluish gray or plumbeous; remiges and upper 

 tail-coverts dull black edged with deep plumbeous. :preast, sides, and 

 flanks rich gallstone-yellow, or deep Indian yellow, changing to purer, 

 more gamboge, yellow on belly; anal region and under tail-coverts 

 white, the latter extensively bluish gray centrally; tibi« uniform deep 

 ash-gray. Bill (both mandibles) "bluish horn-color." Length (of 

 dried skin), about 5.00; wing, 3.40; tail, 2.50; exposed culmen, AS- 

 depth of bill at base, .32; tarsus, .85; middle toe, .02. 



Adult female:^ (No. C537, Lafresuaye Collection, Bost. Soc. Nat. Hist.) : 

 Similar to the male, as described above, but colors duller; the gray of 

 head, neck, wings, &c., decidedly less bluish ; the olive-green collar 

 nearly obsolete (especially across hind-neck) ; and the back olive-russet, 

 nearly uniform with the olive-yellowish color of rump; the lower parts, 

 however, very much the same. Length (mounted specimen), about 

 5.50 ; wing, 3.15 ; tail, 2.50 ; exposed culmen, .48 ; depth of bill at base, 

 .30 ; tarsus, .85 ; middle toe, .00. 



Young male (No. 107585, Puuta Arenas, Tierra del Fuego ; M. Le- 

 brun) : Above olivaceous, the back and scapulars strongly tinged with 

 russet, and pileum inclining to grayish ; prevailing color of wings dull 

 gray, slightly tinged with olive, the outer webs of greater coverts and 

 tertials indistinctly tipped with dull brownish buify ; tail grayish 

 blue, as in adult ; an indistinct superciliary streak of light yellowish 

 olive ; lores grayish dusky ; ear-coverts dull grayish ; lower parts dull 

 gallstone-yellow, paler on chin and throat, deeper on breast and sides, 

 tinged with olive on flanks; lower tail-coverts dull pale yellowish. 

 Wing, 3.15; tail, 2.50; exposed culmen, .50; depth of bill at base, .32; 

 tarsus, .85; middle toe, .65. 



The supposed female of this species (described above) resembles rather 

 closely the adult male of P. gayi, but is decidedly smaller (wing, 3.15 

 instead of 3.50), has the olive-green of the back strongly washed super- 

 licially with russet, the rich olive-yellow of the rump thus appearing 

 brighter by contrast ; the yellow of the lower parts is richer (approxi^ 

 mating very closely to the hue of Indian yellow), and the thighs are 

 deep gray instead of grayish white. The gray of the head, neck, wings, 

 &c., is, however, exactly the same. 

 PROC. N. M. 87 28 



