Bulletin - United States National Museum - si-pddr - Smithsonian ...
Bulletin - United States National Museum - si-pddr - Smithsonian ... Bulletin - United States National Museum - si-pddr - Smithsonian ...
248 BULIjETIN 133, UNITED STATES NATIONAL MUSEUM nest I found five eggs, all pierced by the bill of some bird. On November 16 I collected a set of four fresh eggs, with one of Molothrus honariensis five leagues east of Santo Domingo, Buenos Aires, from a nest placed on top of a fence post. The side of one of the eggs had been broken when the nest was opened. Three of the eggs in this set are normal, while one is considerably dwarfed. They measure, in millimeters, as follows: 30.9 by 21.6; 30.7 by 21.7: 29.8 by 21.2; and 21.4 by 17.6. FURNARIUS RUFUS PARAGUAYAE Cherrie and Reichenberger Furnarius rufus paraguayae Chebkie and Reichenbekgee, Amer. Mus. Nov., no. 27, Dec. 28, 1921, p. 5. (Puerto Pinaf^co, Paraguay.) The Paraguayan ovenbird was recorded at the following localities Resistencia, Chaco, July 5 to 10 (adult female, taken July 8) Palmas, Chaco, July 13 to 31 (adult male and female, shot July : ; Las 31) ; Formosa, Formosa, August 5, 23, and 24; Eiacho Pilaga, Formosa, August 7 to 21 (adult female, August 7, adult male, August 11) ; Puerto Pinasco, Paraguay, September 1, 3, and 30; Kilometer 80, west of Puerto Pinasco, Paraguay, September 6 to 21 (adult female, on September 17). This recently described form is smaller and darker colored than F. r. y'w/ws, and, though similar in measurements to F.r.conunersonij is much duller (less rufescent), especially on the back. In F. r. rufus (15 specimens) from the Province of Buenos Aires, Uruguay, and extreme southern Rio Grande do Sul (one specimen from Quinta, between Rio Grande do Sul and Pelotas) the wing measures from 97-104 mm. Seven skins of F. r. paraguayae from Chaco, Formosa and Paraguay (Sapucay and 80 kilometers west of Puerto Pinasco) range from 90-95.2 mm., while four F. r. comTnersoni from Urucum, Matto Grosso (loaned for examination by the American Museum of Natural History) measure from 90.4r-94.4 mm. Specimens from Resistencia and Las Palmas are only slightly darker than birds from Buenos Aires, but are so small (wing, 92.4, 94.3, and 95 mm.) that they are best placed with paraguayae. Skins from the interior of Formosa are darker even than one from near Puerto Pinasco, the type locality. It would appear that F. r. j)(iraguayae ranges in the Argentine and Paraguayan Chaco, and in an indeterminate area east of the Rio Paraguay in Paraguay, while F. r. rufus extends from Bahia Blanca and Guamini northward into central Uruguay (Rio Negro), and probably into southern Santa Fe. Allocation of records for ovenbirds that I made at Tapia, Tucuman, from April 7 to 14, 1921, is uncertain, since Cherrie and Reichenberger consider birds from Perico, Jujuy, and Embarcacion, Salta, intermediate but nearer F. r. covimersoni.
BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 249 In the Chaco the ovenbird, while it came regularly about the older e«tancia houses and the small towns, was more of a bird of the country than in the pampas. The birds ranged through tracts of open groves near savannas, and did not penetrate far into the denser forests. Open borders of lagoons were favorite feeding places, and in such places horneros sometimes congregated until several were feeding in a relatively small area. When thus engaged they often suggested sandpipers, particularly when seen at a dis- tance. In walking they frequently take several long steps, pause with one foot raised for an instant, and then continue. Their gait is easy and, when desired, as rapid as that of a blackbird. On September 3, at I'uerto Pinasco, one Avas observed carrying food to young in the nest. The Toba Indians called this species kwo ti ih. UPUCERTHIA DUMETARIA Is. Geoff. Saint-HUaire Upucerthia Dumctaria Is. Gbx)ff. Saint-Hilaibe, Nouv. Ann. Mas. Hist. Nat. (Paris), vol. 1, 1832, p. 394. (Patagonia.) A male shot at General Roca, Rio Negro, November 23, 192l\ and another taken April 28, 1921, at Concon, Chile, are difficult to place subspecifically with the comparative material at present available. The bird from Roca, in worn breeding plumage, is slightly more rufescent than specimens that may represent true dumetaria from farther south in Rio Negro. It thus shows approach to Vfucerthia duTiietaria darwini Scott,"'' according to the original description. The specimen has the following measure- ments: Wing, 105.2; tail. 76.2; culmen from base, 34; tarsus, 25.2 mm. The bird from Concon, Chile, is much darker in color throughout and belongs to another form. It would appear that this is Upucerthia dumelaria saturatior Scott,^^ the type of which may have come from the vicinity of Valparaiso. Upucerthia tamucoensh Chubb ^- is doubtfully distinct from saturatior. The specimen from Concon measures: Wing, 96.8; tail, 70.6; culmen from base, 31.5; tarsus, 24 mm. It seems to possess the smaller measurements at- tributed by Chubb to faTnucoensis. Near General Roca this species was found among the heaviest growths of A triplex and other shrubs in the lowland flood plain of the Rio Negro, where it was recorded on November 23, 24, and 27. ^ Upucerthia dartoini Scott, Bull. Brit. Orn. Club, vol. 10, Apr. 30, 1900, p. Ixlii. (Mendoza.) ^ Uptwerthia saturatior Scott, Bull. Brit. Orn. Club, vol. 10, Apr. 30, 1900, p. Ixiil. (Central Chile, "ex Berkeley James Coll.") ^ (Upucerthia tamucoensis Chubb, Bull. Brit. Orn. Club, vol. 27, July 13, 1911, p. 101, ("Tamueo" southern Chile.")
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BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 249<br />
In the Chaco the ovenbird, while it came regularly about the older<br />
e«tancia houses and the small towns, was more of a bird of the<br />
country than in the pampas. The birds ranged through tracts of<br />
open groves near savannas, and did not penetrate far into the<br />
denser forests. Open borders of lagoons were favorite feeding<br />
places, and in such places horneros sometimes congregated until several<br />
were feeding in a relatively small area. When thus engaged<br />
they often suggested sandpipers, particularly when seen at a dis-<br />
tance. In walking they frequently take several long steps, pause<br />
with one foot raised for an instant, and then continue. Their gait<br />
is easy and, when de<strong>si</strong>red, as rapid as that of a blackbird. On<br />
September 3, at I'uerto Pinasco, one Avas observed carrying food to<br />
young in the nest.<br />
The Toba Indians called this species kwo ti ih.<br />
UPUCERTHIA DUMETARIA Is. Geoff. Saint-HUaire<br />
Upucerthia Dumctaria Is. Gbx)ff. Saint-Hilaibe, Nouv. Ann. Mas. Hist.<br />
Nat. (Paris), vol. 1, 1832, p. 394. (Patagonia.)<br />
A male shot at General Roca, Rio Negro, November 23, 192l\<br />
and another taken April 28, 1921, at Concon, Chile, are difficult<br />
to place subspecifically with the comparative material at present<br />
available. The bird from Roca, in worn breeding plumage, is<br />
slightly more rufescent than specimens that may represent true<br />
dumetaria from farther south in Rio Negro. It thus shows approach<br />
to Vfucerthia duTiietaria darwini Scott,"'' according to the<br />
original description. The specimen has the following measure-<br />
ments: Wing, 105.2; tail. 76.2; culmen from base, 34; tarsus,<br />
25.2 mm.<br />
The bird from Concon, Chile, is much darker in color throughout<br />
and belongs to another form. It would appear that this is Upucerthia<br />
dumelaria saturatior Scott,^^ the type of which may have<br />
come from the vicinity of Valparaiso. Upucerthia tamucoensh<br />
Chubb ^- is doubtfully distinct from saturatior. The specimen from<br />
Concon measures: Wing, 96.8; tail, 70.6; culmen from base, 31.5;<br />
tarsus, 24 mm. It seems to possess the smaller measurements at-<br />
tributed by Chubb to faTnucoen<strong>si</strong>s.<br />
Near General Roca this species was found among the heaviest<br />
growths of A triplex and other shrubs in the lowland flood plain of<br />
the Rio Negro, where it was recorded on November 23, 24, and 27.<br />
^ Upucerthia dartoini Scott, Bull. Brit. Orn. Club, vol. 10, Apr. 30, 1900, p. Ixlii.<br />
(Mendoza.)<br />
^ Uptwerthia saturatior Scott, Bull. Brit. Orn. Club, vol. 10, Apr. 30, 1900, p. Ixiil.<br />
(Central Chile, "ex Berkeley James Coll.")<br />
^ (Upucerthia tamucoen<strong>si</strong>s Chubb, Bull. Brit. Orn. Club, vol. 27, July 13, 1911, p. 101,<br />
("Tamueo" southern Chile.")