BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 391 



or into the ground and then a cavity opened by thrusting apart the 

 tips of the mandibles so that any food concealed may be seized. 



In one male taken the bill at the base was dark neutral gray shad- 

 ing through light grape green and water green to olive buff at tip; 

 iris Rood's brown; tarsus benzo brown; toes dark neutral gray; 

 claws mouse gi'ay. Another male had the bill deep sea-foam green 

 at center, shading to number 7 gray at base and olive buff at tip; 

 iris maroon. 



In the Chaco the bird was known locally as que ve in imitation of 

 its note. The Toba Indian name was kom kom. 



Family THRAUPIDAE 



TANAGRA CHLORITICA VIOLACEICOLLIS (Cabanis) 



Acroleptes violaceicollis Cabanis, Joiini. fiir Ornitli., 1865, p. 409. 

 (Brazil.) 



Two male euphonias shot at Las Palmas, Chaco, July 23 and 26, 

 1920, are identified under this name in accordance with the treat- 

 ment of Hellmayr.*^ Berlepsch ^^ considered the bird from this 

 region as representative of Tanagra sernro8tris (d'Orbigny and 

 Lafresnaye). The skins preserved have a wing measurement of 

 58.5 and 59 mm. respectively, and are somewhat larger than two 

 skins from Bahia. They are barely larger and have faintly broader 

 bills than three of the same type of coloration from Chapada, Matto 

 Grosso. 



The species was recorded frequently at Las Palmas from July 

 23 to 31, and was seen at Formosa, Formosa, August 23 and 24. At' 

 tention was drawn to it by its high-pitched whistled call tee tee tee 

 whee-ee (identical, so far as my memory served, with that of Tan- 

 agra scJateH of Porto Rico) ; and on looking about the birds were 

 found near some clump of mistletoe, the berries of which seemed to 

 form their food. At times they hopped about actively among the 

 twigs, singing a warbling song, but usually perched quietly, uttering 

 their whistle at intervals. 



TACHYPHONUS RUFUS (Boddaert) 



Tangara rufa Boddaebt, Tabl. Planch. Enl., 1783, p. 44. (Cayenne.) 



The white-shouldered tanager was found at Resistencia, Chaco, 

 July 8 to 10 (male and female taken) ; Las Palmas, Chaco, July 13 

 to 30 (male skinned, July 26) ; Riacho Pilaga, Formosa, August 9 

 to 18 (male and female, August 15) ; Kilometer 25, west of Puerto 

 Pinasco, Paraguay, September 1, and Kilometer 80, west of the 



««Nov. Zool., vol. 30, October, 1923, pp. 282-235. 



soVerli. V. Int. Ornith.-Kongr. Berlin, 1911, pp. 1014, 1123. 



