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U. S. NATIONAL MUSEUM BULLETIN 133 PL. 9 Open Forest OF Calden iProsopis nigra i. Nesting Ground of Banded Falcon (Spiziapteryx circumcinctus) and Boyero 'Taenioptera IRUPERO) Near Victorica, Pampa, December 23, 1920
BIRDS OF AEGENTINA, PARAGUAY, URUGUAY, AND CHILE 29 March 27. The small series secured at General Roca came from a point about 80 kilometers east of the town of Neuquen, the type locality of the subspecies described as morenoi by Chubb. These differ from birds from the mouth of the Rio Negro (designated b} Peters, Bull. Mus. Comp. Zool., vol. 65, May, 1923, p. 287, as type locality of C. e. elegans), in grayer coloration and in lighter, less heavy barring of the underparts that tend to become immaculate on the abdomen. The two birds from Tunuyan, Mendoza, differ from those from General R.oca in slightly browner coloration, with the light spots and bars on the upper surface larger, giving a distinctly more speckled appearance to the back. This same tendency is exhibited in the juvenile specimen from Victorica, Pampa. Birds from the three localities, however, may be allocated to morenoi without violence, giving this form a range extending from the Rio Negro, in Neuquen and western Rio Negro (probably from the southern side of the watershed of this stream), north through the plains and lower Andean foothills to central Mendoza, and east through the western Pampas to extreme north central Pampa (probably through San Luis). In San Juan morenoi is replaced by the peculiar pale Calopezus e. albidus Wetmore,^° while to the northward are found CaJopezus e. formosus Lillo in eastern Tucuman and northwestern Santiago del Estero and C. e. intermedins Dabbene and Lillo ^^ in the Andean valleys of w^estern Tucuman and La Rioja. CalojJesus elegans elegans is thus confined to eastern and southern Patagonia and southern Buenos Aires. An adult male of morenoi from General Roca taken December 2 is molting and has new feathers of the body plumage appearing on the back. These new plumes are considerably darker in ground coloi- than the old feathers, while the light markings are suffused with u deeper shade of buff, indicating that the dry arid climatic conditions found in the haunt of this bird induce considerable fading of the plumage. The chick (U. S. Nat. Mus. No. 283661) has the ground color of the head buffy brown, with a line of dull white extending from the base of the nasal groove backward on either side of the crown down over the back of the neck. This line has the brown feathers on either margin tipped with points of black that form a broken border for it. A well- developed straight crest of 8 or 10 filamentous plumes extends from the back of the crown ; this is buffy brown in color with the feathers marked with black below the extremity. Lores buffy brown extending as a narrow line almost to edge of eyelid ; super- " Calopezus elegans albidus Wetmore, Journ. Washington Acad. Sci., 1921, p. 437 (San Juan). "An. Mus. Nac. Hist. Nat. Buenos Aires, vol. 24, July 22, 1913, p. 194. 54207—26 3
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Page 8 and 9: ADVERTISEMENT The scientific public
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BIRDS OF ARGENTINA, PARAGUAY, URUGU
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BIRDS OF AKGENTINA, PARAGUAY, URUGU
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BIKDS OF ARGENTINA, PARAGUAY, URUGU
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BIEDS OF ARGENTINA, PARAGUAY, URUGU
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BIRDS OF AKGENTINA, PARAGUAY, URUGU
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BIEDS OF ARGENTINA, PARAGUAY, URUGU
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INDEX Page a. bivittatus, Lepidocol
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cactorum, Trichopicus INDEX 437 Pag
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INDEX 439 Page Page defllippii, Tri
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INDEX 441 Page immaculata, Phaeopro
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INDEX 443 Page Myospiza humeralis c
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INDEX 445 Page Pseudoseisura guttur
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INDEX 447 Page Sublegatus fasciatus
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SMITHSONIAN INSTfTUTION LIBRARIES 3
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