Bulletin - United States National Museum - si-pddr - Smithsonian ...
Bulletin - United States National Museum - si-pddr - Smithsonian ... Bulletin - United States National Museum - si-pddr - Smithsonian ...
370 BULLETIN 133, UNITED STATES NATIONAL MUSEUM One taken July 9 had the bill blackish slate ; yellow ; iris very dark brown. BASILEUTERUS FLAVEOLUS (Baird) tarsus and toes honey Myiothlypis flavcolus Baird, Rev. Amer. Birds, May, 1865, p. 252. (Para- guay. ) This warbler was found only in the region west of Puerto Pinasco, Paraguay, where it was seen September 1, 1920, near Kilometer 25, and September 9 to 20, near Kilometer 80. Adult males, taken September 1 and 10, were preserved as skins. The species ranged in pairs in dense forest growth, feeding on or near the ground. The birds Avere shy but were occasionally seen walking or hopping about with constantly jerking tail. Males sang a sweet, warbling song, and the call note w^as a sharp chip. MYIOBORUS BRUNNICEPS (d'Orbigny and Lafresnaye) Setophar/a irunniceps (I'Orbigny and Lafresnaye, Mag. Zool.. 1837, p. 50. (Yungas, Bolivia.) On* April 17, 1921, the handsome brown-capped redstart was common on the slopes of the Sierra San Xavier above Tafi Viejo, Tucuman, between 1,800 and 2,100 meters, where it ranged in thickets of low, rather dense undergrowth scattered over rolling slopes above the forest, or occasionally came into more open areas among the groves of tree alders. The birds, alert and active in every move- ment, flew from perch to perch with a flirt of the tail that displayed the prominent white of the outer feathers. The specimen preserved is an immature male in fresh fall plumage. GEOTHLYPIS AEQUINOCTIALIS VELATA (Vieillot) Sylvia velata Vieillot, Hist. Nat. Ois. Amer. Sept., vol. 2, 1807, p. 22, pi. 74. (No locality. " De la collection de M. Dufresne.") The present yellowthroat was so local in its distribution and so sedentary that it was probably overlooked in many localities. It was recorded as follows: Las Palmas, Chaco, July 20, 22 (adult male taken), and 28 (male and female shot); Riacho Pilaga, Formosa, August 9 and 17 (a male taken on each of the dates mentioned) Formosa, Formosa, August 24 (immature male seciu-ed) ; Lazcano, Uruguay, February 5 (immature male) ; Rio Negro, Uruguay, February 17 (immature female) and 18 (immature female, adult male) ; Tapia, Tucuman, April 11 and 12 (adult females on the two dates given). Immature birds are somewhat browner than others, while adults shot in winter are more richly colored than those secured in summer. Immature birds were common in February, and adults taken in Uruguay in February and in Tucuman in April were in full ;
BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 371 molt. Several seen had lost all of the rectrices and all were in ragged condition. No definite differences are apparent in birds from the localities mentioned.*'- This yellowthroat frequented cat-tails or other aquatic growth standing in water, or dense tangles of herbaceous vegetation border- ing wet swales, or other low localities. In this safe cover they crept about cautiously, at times flying for short distances with quick, tilt- ing flight to some safe retreat among the grasses. Though often common it was difficult to catch sight of them. Their call note was a harsh tseep tseej)-, quite different from the scolding call of Geo- thlypis triehas. I did not identify their song. COMPSOTHLYPIS PITIAYUMI PITIAYUMI (Vieillot) Sylvi-a pitiayiimi Vieillot, Nouv. Diet. Hist. Nat., vol. 11, 1817, p. 276. (Paraguay.) The present species, with a broad distribution through humid wooded areas in the northern half of Argentina, was recorded at the following points : Kesistencia, Chaco, July 8 to 10, 1920 (male, July 8); Las Palmas, Chaco, July 13 to 30; Eiacho Pilaga, Formosa, August 18; Formosa, Formosa, August 23 and 24; Kilometer 25, west of Puerto Pinasco, Paraguay, September 1 (male) ; Kilometer 80, west of Puerto Pinasco, September 6 to 21 (male, September 8) ; Cerro Lorito, opposite Puerto Pinasco, September 30; San Vicente, Uruguay, January 28 to 31, 1921 (adult male, January 28) ; Lazcano, Uruguay, February 5 to 8 (immature male and female, February 5) ; Kio Negro, Rio Negro, February 15 (one with sex not determined) Tapia, Tucuman, April 6 to 13 (immature female, April 9; Tafi Viejo, Tucuman, April 17 (male). The series of specimens taken is fairly uniform with exception of a male in fresh plumage shot April 17 at an altitude of 1,800 meters on the slopes of the Sierra San Xavier. This bird is faintly darker above than typical birds from Paraguay and indicates an approach to the coloration found in C. p. elegans Todd,*^^ though lighter than the average of that form as shoAvn in a series examined from Co- lombia to southern Peru. More recently Todd has described an ad- ditional form, Gompsothlypis p. melanogenys^^ from Yungas de Cochabamba, Bolivia (elevation 1,500 meters), which is said to be much deeper in color, particularly above, than elegans. This I have not seen. It is possible that the bird from the Sierra San Xavier represents an approach toward vielanogenys. Further collections "''For the use of the name velata see Hellmayr, Nov. Zool., vol. 28, September, 1921, pp. 243-244. *3 Compsothlypis pitiayumi elegans Todd, Ann. Carnegie Mus., vol. 8, May 20, 1912, p. 204. (Anzoategui, Estado Lara, Venezuela.) " Proc. Biol. Soc. Washington, vol. 37, July 8, 1924, p. 123. ;
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BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 371<br />
molt. Several seen had lost all of the rectrices and all were in<br />
ragged condition. No definite differences are apparent in birds<br />
from the localities mentioned.*'-<br />
This yellowthroat frequented cat-tails or other aquatic growth<br />
standing in water, or dense tangles of herbaceous vegetation border-<br />
ing wet swales, or other low localities. In this safe cover they crept<br />
about cautiously, at times flying for short distances with quick, tilt-<br />
ing flight to some safe retreat among the grasses. Though often<br />
common it was difficult to catch <strong>si</strong>ght of them. Their call note was<br />
a harsh tseep tseej)-, quite different from the scolding call of Geo-<br />
thlypis triehas. I did not identify their song.<br />
COMPSOTHLYPIS PITIAYUMI PITIAYUMI (Vieillot)<br />
Sylvi-a pitiayiimi Vieillot, Nouv. Diet. Hist. Nat., vol. 11, 1817, p. 276.<br />
(Paraguay.)<br />
The present species, with a broad distribution through humid<br />
wooded areas in the northern half of Argentina, was recorded at the<br />
following points : Ke<strong>si</strong>stencia, Chaco, July 8 to 10, 1920 (male, July<br />
8); Las Palmas, Chaco, July 13 to 30; Eiacho Pilaga, Formosa,<br />
August 18; Formosa, Formosa, August 23 and 24; Kilometer 25, west<br />
of Puerto Pinasco, Paraguay, September 1 (male) ; Kilometer 80,<br />
west of Puerto Pinasco, September 6 to 21 (male, September 8) ;<br />
Cerro Lorito, oppo<strong>si</strong>te Puerto Pinasco, September 30; San Vicente,<br />
Uruguay, January 28 to 31, 1921 (adult male, January 28) ; Lazcano,<br />
Uruguay, February 5 to 8 (immature male and female, February 5) ;<br />
Kio Negro, Rio Negro, February 15 (one with sex not determined)<br />
Tapia, Tucuman, April 6 to 13 (immature female, April 9; Tafi<br />
Viejo, Tucuman, April 17 (male).<br />
The series of specimens taken is fairly uniform with exception of<br />
a male in fresh plumage shot April 17 at an altitude of 1,800 meters<br />
on the slopes of the Sierra San Xavier. This bird is faintly darker<br />
above than typical birds from Paraguay and indicates an approach<br />
to the coloration found in C. p. elegans Todd,*^^ though lighter than<br />
the average of that form as shoAvn in a series examined from Co-<br />
lombia to southern Peru. More recently Todd has described an ad-<br />
ditional form, Gompsothlypis p. melanogenys^^ from Yungas de<br />
Cochabamba, Bolivia (elevation 1,500 meters), which is said to be<br />
much deeper in color, particularly above, than elegans. This I have<br />
not seen. It is pos<strong>si</strong>ble that the bird from the Sierra San Xavier<br />
represents an approach toward vielanogenys. Further collections<br />
"''For the use of the name velata see Hellmayr, Nov. Zool., vol. 28, September, 1921,<br />
pp. 243-244.<br />
*3 Compsothlypis pitiayumi elegans Todd, Ann. Carnegie Mus., vol. 8, May 20, 1912,<br />
p. 204. (Anzoategui, Estado Lara, Venezuela.)<br />
" Proc. Biol. Soc. Washington, vol. 37, July 8, 1924, p. 123.<br />
;