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10 BULJUETIN 133, UNITED STATES NATIONAL MUSEUM stretching inland from muddy bays, where shore birds were common. Woody vegetation was confined to low shrubs (mainly Grahwmia hracteata), except where willows or eucalypts grew about scattered houses. Broad areas were covered with Salicornia. December 14 I moved north by rail to Carhue, Buenos Aires, a small town just beyond the Sierra de la Ventana, with a large lake of strongly saline water known as Lago Epiquen near by. The country here was rolling and was divided, as usual, into large estates given to grazing or the cultivation of wheat. Hollows on the pampa were occupied by little ponds or marshes, and extensive upland^ were grown with bunch grass. Thousands of grebes were present on the large lake, attracted perhaps by myriads of brine shrimp, but were preparing to move to their breeding grounds elsewhere. After a few days spent in observation and collecting in this somewhat high pampa, on December 21 I continued by rail by way of Alta Vista, Darragueira, and Pico to Victorica, in the Gobernacion de Pampa, where I arrived Decem- ber 22. Rolling sand dunes mingled with more level areas at this point and there were extensive tracts of open forest of calden {Prosopis nigra), a thick-trunked, short-limbed tree, with lower growth of smaller trees, spiny shrubs, and stalked cacti. The region had been reported as one of many lagoons, but the present season had been extremely dry so that little water remained, and water-loving birds had perforce departed for other regions. The drought broke after Christmas, and two tremendous downpours filled all hollows with water. Small brush and tree haunting birds were very abundant here, but their tenure is limited, as land is being steadily cleared for wood or for cultivation. The belt of forest (pi. 9) was reported to extend for many kilometers north and south. On December 31 I departed by rail for Buenos Aires, where I arrived the following day. January 7, 1921, I embarked on a steamer and early the following morning arrived in Montevideo, Uruguay, where I was occupied in various official matters for nearly two weeks, with time only for excursions along the coast to Carrasco, a summer resort, or to some of the numerous parks. On January 22 I proceeded by train to San Carlos and crossed by motor to Rocha in eastern Uruguay. The following morning I went for the day by train to the port of Rocha, known as La Paloma, where I found an extensive sand beach bordered inland by rolling pampa, cut by steepwalled gullies that sheltered dense thickets. Returning to Rocha the following morning I continued by motor from Rocha to San Vicente de Castillos, called locally Castillos, and shown on most maps as San Vicente. Inland, rounded hills, with frequent exposures of granite, rose with slopes grown with thickets and low trees. The Cerro Navarro, northeast of town, was especially promi-
U. S. NATIONAL MUSEUM BULLETIN 133 PL. 6 View Across Level Pampas of Eastern Buenos Aires From lookout station at Estancia Los Yngleses, Lavalle, Buenos Aires, October 30, 1920 Plantation of Trees on Pampa, Attractive to Small Brush Inhabiting Birds. An Ombu Tree at Left Estancia Los Vngleses, Lavalle, Buenos Aires, November 10, 1920
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Page 8 and 9: ADVERTISEMENT The scientific public
Page 10 and 11: IV TABLE OF CONTENTS Annotated list
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BIRDS 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 447 Page Sublegatus fasciatus
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SMITHSONIAN INSTfTUTION LIBRARIES 3
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