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190 BULLETIN 133, UNITED STATES NATIONAL MUSEUM and worked rapidly tlirougli the l)ranches of the trees. Their flight was direct, and seldom high above the earth. The small wings and long tail give them the appearance in the air usual in allied species. The young bird taken, barely from the nest, had the inside of the mouth ornamented with a series of tubercles dead white in color that outlined the throat cavity in a startling manner when the mouth was opened. Four lay at the angles of the pharynx, one ornamented the tongue, and five somewhat less prominent were found on the palate. Against a duller background their pure white color stood out prominently. Such ornaments, visible only when the mouth is fully opened must serve as directive markings to assist the adults in placing food properly, when feeding the young. The 3"oung bird, not yet fully fledged, has the throat and breast grayish white and the wings, tail, and dorsal surface in general with a faint rufescent wash that is absent in the adults. The adult male, taken April 8, had renewed all of the flight feathers save the tenth primary. The adult female secured the day previous has renewed all save the third and sixth primaries and some of the secondaries. The female, taken December 23, had the bill black; bare skin around eye hydrangea red ; iris pomegranate purple ; tarsus and toes deep neutral gray ; claws black. COCCYZUS MELACORYPHUS (VieUlot) Coccysus melacoryplius Vieillot, Nouv. Diet. Hist. Nat., vol. 8, 1817, p. 271. (Paraguay.) The present cuckoo is a thicket-haunting species found in low scrub, so shy that it is difficult to observe. Near Rio Negro, Uruguay, from February 14 to 19, 1920, I found these birds on their breeding grounds in heavy brush that bordered streams. Here they were ob- served searching for food among leafy branches from :) to 6 meters from the ground, or were heard calling, a low, guttural cuh-h-hy audible only a short distance awa}'. They were shy and nervous and sought safer cover whenever they found that they were seen. On February 15 one was seen carrying food to young, while on February 18 two in Juvenal plumage, fully grown, were taken. Adult males taken February 15 and 19 and females shot on February 14 and 18 are in full breeding plumage. The two young (male and female), secured February 18, are slightly duller brown above than adults and have the light markings on the tail diffuse and not sharply delimited. The young apparently molt the retrices before the next breeding season. At Tapia, Tucuman, two males were taken in the thickets frequented by Micrococcyx cinereus on April 7 and 12. These, both adult, are in process of molt on head, neck, and breast and are renewing the quill feathers. In one molt of the primaries has begun
BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 191 with renewal of the fifth, ninth, and tenth in one win
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U. S. NATIONAL MUSEUM BULLETIN, 133
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ADVERTISEMENT The scientific public
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IV TABLE OF CONTENTS Annotated list
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2 BULLETIN 133^ UNITED STATES NATIO
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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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BIEDS OF AEGENTINA, 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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