BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 309 



where it ran about on the ground or perched with rapidly jerking 

 tail in the bushes. Another was seen, but not secured, at the border 

 of a flooded estero near Puerto Pinasco, Paraguay, on September 3, 



YETAPA RISORUS (Vieillot) 

 Muscicapa risora Vieuxot, Gal. Ois., vol. 1, 1S25, p. 209, pi. 131. (Brazil.) 



The type locality of the present species is cited in most references 

 as Paraguay, on thesupposition that it isbas.'donthec<9Zfl^rar<z^ar^o 

 y hlanco of Azara. Vieillot, however, described the species from an 

 actual specimen and remarks " Le nom latinise sous lequel nous 

 decrivons cette espece est celui qu'elle porte au Bresil," and discusses- 

 further certain differences between his specimen and the description 

 of Azara. The specific name, usually given risorius^ is spelled as 

 above in the original publication. The form of the tail in both sexes- 

 of the present bird, taken in connection with its long, slender clawSy 

 are so different from the condition found in Alectrurus tricolo7' as 

 to warrant generic separation. Hence insorus is placed in the genus 

 Yetapa Lesson.^* In form Yetapa is more similar to the large 

 Guhernetes than to Alectimrus. 



An adult female, the only one taken, was shot August 18, 1920, 

 at the Riacho Pilaga, Formosa, in a heavy growth of tall grass that 

 covered a small prairie. The bird perched on the side of the tall- 

 stemmed seed heads or flew for short distances with a tilting flight. 

 Another was seen but not secured near Carhue, western Buenos Aires, 

 in December. 



The Anguete Indians, in Paraguay, recognized the specimen that 

 I had and called it uh yuh ka hi ha oi koh. 



GUBERNETES YETAPA (Vieillot) 



Muscicapa yetapa Vieillot, Nouv. Diet. Hist. Nat., vol. 21, 1818, p. 460. 

 (Paraguay.) 



An adult female was taken near Las Palmas, Chaco, on July 27, 

 1920, from a flock of three that passed me on an open savanna with 

 direct, slight!}^ tilting flight and undulating tails. Their call was 

 a harsh note that may be represented as rut rut. The bird secured 

 is in full plumage and offers no j)eculiarities worthy of remark. The 

 claws in this species, while less developed than in Yetapa risoru^j 

 are elongate and rather slender. 



SISOPYGIS ICTEROPHRYS (Vieillot) 



Muscicapa icterophrys Vieillot, Nouv. Diet. Hist. Nat., vol. 21, 1818, p. 458. 

 (Paraguay.) 



Adult males were secured at the Estancia Los Yugleses, near 

 Lavalle, Buenos Aires, on October 30 and November 1, 1920, and an 



"Trait. Ornith., 1831, p. 387. 



